Keto Roasted Pumpkin with Gorgonzola, Walnuts and Rosemary
Keto roasted pumpkin sounds like a contradiction at first, because pumpkin brings more carbs than most vegetables. As a side dish in a 100 g serving of Hokkaido, though, it works without any trouble: the wedges are roasted at high heat until the edges caramelize, then bold gorgonzola melts over the top, and toasted walnuts add fat and crunch. Per serving, that comes to around 6 g net carbs and 23 g fat. In October, Hokkaido pumpkin goes straight from the field to the stores, is inexpensive and more flavorful than at any other time of year.
Key facts at a glance
- Preparation time: approx. 40 minutes, only 10 minutes of which is hands-on - the oven does the rest.
- Approx. 6 g net carbs and 23 g fat per serving.
- Ingredients: Hokkaido pumpkin, gorgonzola, walnuts, rosemary, garlic, olive oil, arugula.
- Works as a vegetarian side dish for meat or fish, or as a light dinner for two.
Ingredients
One serving is about 100 g Hokkaido with gorgonzola and walnuts as a side dish; as a main course, the sheet serves two people.
| Amount | Ingredient | Note | ||
|---|---|---|---|---|
| Hokkaido pumpkin | approx. 1/2 small pumpkin, unpeeled, in 2 cm thick wedges | |||
| approx. 1/2 small pumpkin, unpeeled, in 2 cm thick wedges | ||||
| olive oil | approx. 2 tbsp | |||
| approx. 2 tbsp | ||||
| rosemary | 2 sprigs, needles stripped and chopped | |||
| 2 sprigs, needles stripped and chopped | ||||
| garlic cloves | thinly sliced | |||
| thinly sliced | ||||
| gorgonzola | bold (piccante), broken into chunks | |||
| bold (piccante), broken into chunks | ||||
| walnuts | coarsely chopped | |||
| coarsely chopped | ||||
| arugula | washed and spun dry | |||
| washed and spun dry | ||||
| lemon juice | approx. 2 tsp, freshly squeezed | |||
| approx. 2 tsp, freshly squeezed | ||||
| salt | use sparingly, the gorgonzola is salty | |||
| use sparingly, the gorgonzola is salty | ||||
| pepper | freshly ground | |||
| freshly ground | ||||
| chili flakes | - | |||
Preparation
-
Preheat the oven and cut the pumpkin
approx. 6 minutesDone Amount Icon Ingredient 400 g Hokkaido pumpkin approx. 1/2 small pumpkin, unpeeled, in 2 cm thick wedges Preheat the oven to 220 °C (conventional). Wash the Hokkaido (400 g), halve it, scrape out the seeds with a spoon and cut the flesh unpeeled into wedges about 2 cm thick.
-
Season and roast
approx. 17 minutesDone Amount Icon Ingredient 30 ml olive oil approx. 2 tbsp 4 g rosemary 2 sprigs, needles stripped and chopped 0.5 tsp salt use sparingly, the gorgonzola is salty 0.3 tsp pepper freshly ground 1 pinch chili flakes Toss the wedges in a bowl with olive oil (30 ml), chopped rosemary (4 g), salt (1/2 tsp), pepper (1/4 tsp) and chili flakes (1 pinch). Spread them out on a baking sheet with space between them and roast for 15 minutes.
-
Turn and add the garlic
approx. 10 minutesDone Amount Icon Ingredient 2 cloves garlic cloves thinly sliced Turn the wedges, scatter the garlic slices (2 cloves) over the top and roast for another 10 minutes, until the edges are brown and a knife slides in without resistance.
-
Toast the walnuts
approx. 3 minutesDone Amount Icon Ingredient 40 g walnuts coarsely chopped Meanwhile, toast the coarsely chopped walnuts (40 g) in a dry pan over medium heat until fragrant. Remove them from the pan so they do not keep browning.
-
Melt the gorgonzola and serve
approx. 5 minutesDone Amount Icon Ingredient 120 g gorgonzola bold (piccante), broken into chunks 60 g arugula washed and spun dry 10 ml lemon juice approx. 2 tsp, freshly squeezed Place the gorgonzola (120 g) in chunks on the hot wedges and let it melt in the oven for 4 to 5 minutes. Drizzle with lemon juice (10 ml), scatter the walnuts and arugula (60 g) over the top and serve immediately.
You did it! Enjoy every delicious bite.
Which tips help with keto roasted pumpkin?
- Do not peel the Hokkaido - the skin softens and holds the wedges together.
- Cut the wedges evenly, 2 cm thick, so they are all done at the same time.
- Preheat the oven to 220 °C and space the wedges out, otherwise they steam instead of roasting.
- Add the garlic only for the last 15 minutes so it does not turn bitter.
- Put the gorgonzola on in chunks right at the end - it needs no longer than 5 minutes.
- Add the arugula, lemon juice and walnuts only on the plate so they stay fresh and crunchy.
Why does roasted pumpkin fit keto despite the carbs?
Hokkaido provides around 6.5 g carbs per 100 g, of which about 2 g is fiber - leaving roughly 4.5 g usable carbs. That is considerably more than zucchini or cauliflower, but only a third of what potatoes bring at about 15 g. Portion size is therefore what matters: the 400 g of Hokkaido in this recipe is split across four side-dish servings, so 100 g per person and 4.5 g net carbs. Walnuts contribute around 0.7 g, gorgonzola, arugula and garlic together about 1 g, so a serving lands at around 6 g. At the same time, gorgonzola, walnuts and olive oil provide 23 g fat, which puts the ratio clearly on the keto side. A conventional roasted vegetable side of pumpkin, potatoes and sweet potatoes, by contrast, quickly reaches 25 to 30 g carbs per serving. If you eat the dish as a main course for two, all values double and you land at around 12 g - that works on a day with a light breakfast and lunch, but it is not an everyday figure for strict keto plans. The nutrient values of the individual ingredients can be looked up in the German Nutrient Database (BLS).
Source: Max Rubner Institute – German Nutrient Database (BLS) , FDDB Nutrition Database
Walnuts and gorgonzola as the fat source
Among nuts, walnuts have the highest share of omega-3 fatty acids and bring only about 7 g usable carbs per 100 g alongside around 65 g fat. Gorgonzola, at about 29 g fat per 100 g, contains practically no carbs. Together they ensure the pumpkin does not act as a carb source but as an aromatic carrier for fat. The Harvard Nutrition Source describes the composition of walnuts and their role in the diet in detail.
Source: Harvard T.H. Chan – The Nutrition Source: Nuts for the Heart
Keeping net carbs predictable
Almost three quarters of the carbs come from the Hokkaido. If you count more strictly, serve only 75 g pumpkin per person and fill the sheet with 100 g Brussels sprouts or fennel wedges, which sit at around 3 g net carbs per 100 g. The serving then lands at about 5 g, and the sheet stays just as full. The skin stays on in any case: it softens in the oven, provides fiber and holds the wedges in shape.
How do I serve and vary the roasted pumpkin?
Serve the wedges straight from the sheet while the gorgonzola is still soft, and add the arugula and lemon juice only on the plate - in the oven, the arugula would wilt. As a side, the roasted pumpkin goes well with quickly seared beef, lamb chops or a piece of pan-fried salmon. In my experience, it pays to preheat the oven all the way to 220 °C and not to crowd the wedges: only then do the cut surfaces caramelize instead of steaming in their own juice. In October, you can spot a good Hokkaido by its dry, woody stem and a hard skin that your fingernail cannot press into.
Meal prep and reheating
Without the cheese and arugula, the roasted wedges keep for 4 days in the fridge in an airtight container. To reheat, put them in the oven for 8 minutes at 200 °C, add the gorgonzola for the last 3 minutes and scatter the walnuts over fresh - in the microwave, the edges would turn soft and the cheese rubbery. Cold from the fridge, the wedges also work as a salad ingredient, then with pumpkin seed oil instead of melted cheese. I do not recommend freezing, because Hokkaido turns watery when thawed.
Without gorgonzola and vegan
If you do not like blue cheese, use 120 g goat cheese rounds or feta cheese; both melt less but brown nicely. For a vegan version, the sheet works with 60 g walnuts instead of 40 g, a tablespoon of tahini drizzled over the hot wedges and a handful of toasted pumpkin seeds - the carbs rise by about 1 g per serving. Thyme or sage work in place of rosemary, and if you like it spicier, add half a finely chopped chili pepper to the sheet.
Nutrition values
| Nutrient | Per 100 g | Per serving | Keto context |
|---|---|---|---|
| Calories | approx. 195 kcal | approx. 280 kcal | Sized appropriately as a side dish; as a main course for two, the value doubles. |
| Sized appropriately as a side dish; as a main course for two, the value doubles. | |||
| Fat | approx. 16 g | approx. 23 g | Good for keto. Gorgonzola, walnuts and olive oil provide the fat; the pumpkin itself contributes almost none. |
| Good for keto. Gorgonzola, walnuts and olive oil provide the fat; the pumpkin itself contributes almost none. | |||
| Net carbs | approx. 4.3 g | approx. 6 g | Rather high for a vegetable side - pumpkin is a borderline case. The 100 g serving of Hokkaido is chosen deliberately. |
| Rather high for a vegetable side - pumpkin is a borderline case. The 100 g serving of Hokkaido is chosen deliberately. | |||
| Sugar | approx. 2.2 g | approx. 3 g | Natural sugar from the pumpkin that caramelizes during roasting. The recipe contains no added sugar. |
| Natural sugar from the pumpkin that caramelizes during roasting. The recipe contains no added sugar. | |||
| Protein | approx. 6.7 g | approx. 9.5 g | Solid for a side dish; gorgonzola and walnuts provide most of it. |
| Solid for a side dish; gorgonzola and walnuts provide most of it. | |||
| Salt | approx. 1.3 g | approx. 1.8 g | Raised by the gorgonzola. That is why the wedges are only lightly salted. |
| Raised by the gorgonzola. That is why the wedges are only lightly salted. | |||
Note: Nutrition values are estimated averages per 100 g and per serving and may vary depending on ingredients, brands, portion size, and preparation. They do not replace individual nutrition or medical advice.
FAQ
Is roasted pumpkin allowed on a ketogenic diet?
In a side-dish serving, yes. 100 g Hokkaido costs around 4.5 g net carbs, about 6 g per serving together with gorgonzola, walnuts and arugula. That fits into a daily plan of 20 to 50 g carbs if the rest of the day stays light. Pumpkin is not suitable as a daily vegetable staple in large amounts, though - zucchini, cauliflower or broccoli are the better choice for that.
Can I use butternut or musquée squash instead of Hokkaido?
You can, but with trade-offs. Butternut sits at around 6 g net carbs per 100 g instead of 4.5 g, and its skin is too tough to eat, so you have to peel it. Musquée squash is higher still and softens faster in the oven. Among the common eating pumpkins, Hokkaido is the lowest in carbs, the most flavorful and the only one whose skin can be eaten without any trouble.
Is roasted pumpkin suitable for losing weight on keto?
As a side dish with around 280 kcal per serving, yes. If you want to save calories, reduce the gorgonzola to 80 g and the walnuts to 30 g - the serving then lands at about 220 kcal without losing its character. During a weight-loss phase, pay more attention to the carbs: pumpkin keeps you full for less time than high-fat vegetable dishes, so a protein source such as meat, fish or eggs belongs alongside it.
How do I keep the pumpkin from turning mushy in the oven?
Three things: high heat, space and patience. At 220 °C, the water on the surface evaporates quickly, and the cut surfaces caramelize instead of boiling. If the wedges lie too close together, they steam in their own juice. And do not keep turning the wedges - once after 15 minutes is enough. If you have a convection setting, use it; the moving air dries the surface even more.
Can I prepare the roasted pumpkin ahead when guests are coming?
Yes, that is actually practical. Roast the wedges up to 4 hours ahead and leave them on the sheet. Shortly before your guests eat, put the sheet in the oven for 8 minutes at 200 °C, add the gorgonzola for the last 3 minutes and scatter walnuts and arugula over the top. That way the pumpkin arrives at the table hot and fresh without you standing in the kitchen.