Keto Pumpkin Seed Pesto with Zoodles
Classic pesto alla Genovese uses pine nuts, which are expensive and lower in magnesium. Pumpkin seeds, with approx. 592 mg of magnesium per 100 g, are not only the cheaper choice but also the magnesium-rich one. Served over zucchini noodles, the pesto also delivers potassium from the zucchini (approx. 260 mg per 100 g) and sodium from the parmesan, a combination that brings three electrolytes together in a single dish.
Key takeaways at a glance
- Ready in approx. 20 minutes, a keto-friendly pasta alternative with an electrolyte focus.
- Approx. 5 g net carbs and 30 g fat per serving.
- Ingredients: zucchini, pumpkin seeds, basil, parmesan, garlic, olive oil.
- Ideal for anyone who wants to cover magnesium and potassium on keto through a complete main meal.
Ingredients
1 bowl of zoodles with pesto per person as a complete keto main meal.
| Amount | Ingredient | Note | ||
|---|---|---|---|---|
| Zucchini | approx. 2 medium, spiralized | |||
| approx. 2 medium, spiralized | ||||
| Pumpkin seeds | - | |||
| Fresh basil | - | |||
| Parmesan | freshly grated | |||
| freshly grated | ||||
| Garlic clove | - | |||
| Extra virgin olive oil | approx. 5 tbsp | |||
| approx. 5 tbsp | ||||
| Lemon juice | approx. 1 tbsp | |||
| approx. 1 tbsp | ||||
| Salt and pepper | - | |||
Preparation
Spiralize the zucchini, toast the pumpkin seeds, then blend a pesto from pumpkin seeds, basil, parmesan, garlic and olive oil. Warm the zoodles briefly in a pan and toss with the pesto.
Why is pumpkin seed pesto the better electrolyte choice than pesto with pine nuts?
Pine nuts contain approx. 251 mg of magnesium per 100 g. Pumpkin seeds beat that with approx. 592 mg per 100 g, more than double. For 30 g of pumpkin seeds in the pesto, that works out to approx. 177 mg of magnesium, more than 40% of the daily requirement in a single meal. Zucchini as the noodle base contributes approx. 261 mg of potassium per 100 g at just approx. 2.1 g of net carbs, ideal for zoodles. Parmesan adds sodium and calcium. The full dish therefore covers magnesium, potassium and sodium.
Source: USDA FoodData Central, Seeds, pumpkin and squash seed kernels
Zucchini noodles: potassium and barely any carbs
Zucchini contains approx. 261 mg of potassium per 100 g and only approx. 2.1 g of net carbs. As a noodle substitute in zoodle form, it is ideal on keto. It absorbs the pesto well without giving off too much water as long as it is only warmed briefly and not cooked through. Spiralize it and leave it in the pan for no more than 2 minutes, and it stays al dente.
Heat the pesto or serve it cold?
Pesto should never be heated aggressively. Basil loses its aroma at high heat and turns dark. In this recipe the zoodles are warmed briefly in the pan, then removed from the heat before the pesto is stirred in. That protects the basil aromatics and the chlorophyll, so the pesto stays a vivid green.
How do I serve and vary the keto pumpkin seed pesto?
From experience, pumpkin seed pesto is more versatile than the original. It works on zoodles, as a dip with vegetables, or as a spread on keto-friendly bread. In practice, a jar of pesto in the fridge is a valuable stash for spontaneous keto meals.
Meal prep: pesto in reserve
Pumpkin seed pesto keeps in a screw-top jar with a layer of olive oil on top in the fridge for up to 1 week. The olive oil prevents oxidation and discoloration. Spiralize the zoodles fresh each day, since spiralized zucchini turns watery after a day.
Variation: arugula pumpkin seed pesto
Replace half of the basil with arugula. Arugula brings bitterness, mustard oils (glucosinolates) and more calcium. Combined with the pumpkin seeds, the result is a more robust, nutty-bitter pesto. The carb count stays the same.
Which tips make the keto pumpkin seed pesto better?
- Toast the pumpkin seeds briefly before they go into the blender, this adds roasted notes and reduces phytic acid.
- Stream the olive oil into the running blender gradually for a more emulsified, creamier texture.
- Stir the pesto in only after the zoodles have been warmed, basil suffers under direct heat.
- Keep the zoodles in the pan for no more than 2 minutes, otherwise they turn watery and lose bite.
- Use blocks of parmesan instead of pre-grated, freshly grated brings more aroma and sodium.
Nutrition values
| Nutrient | Per 100 g | Per serving | Keto rating |
|---|---|---|---|
| Calories | approx. 200 kcal | approx. 340 kcal | Moderate. A complete main meal. |
| Moderate. A complete main meal. | |||
| Fat | approx. 17.6 g | approx. 30 g | Very good for keto. Olive oil and pumpkin seeds as fat sources. |
| Very good for keto. Olive oil and pumpkin seeds as fat sources. | |||
| Net carbs | approx. 2.9 g | approx. 5 g | Good for keto. Zucchini is the main carb source. |
| Good for keto. Zucchini is the main carb source. | |||
| Sugar | approx. 1.8 g | approx. 3 g | Low. Naturally from zucchini. |
| Low. Naturally from zucchini. | |||
| Protein | approx. 5.9 g | approx. 10 g | Moderate. Pumpkin seeds and parmesan supply the protein. |
| Moderate. Pumpkin seeds and parmesan supply the protein. | |||
| Salt | approx. 0.5 g | approx. 0.8 g | Low to moderate. Parmesan as the sodium source. |
| Low to moderate. Parmesan as the sodium source. | |||
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
Can I make this pesto without a spiralizer?
Yes. You can also cut the zucchini into wide ribbons (tagliatelle style) with a vegetable peeler, or slice it into thin strips with a knife. A spiralizer gives the prettiest result but is not required.
How much magnesium does one serving of the pesto provide?
One serving contains approx. 30 g of pumpkin seeds in the pesto, which delivers approx. 177 mg of magnesium, around 42 to 57% of the recommended daily value for adults (310 to 420 mg/day). That is one of the highest magnesium contents among keto-compatible main meals.
Can I freeze the pesto?
Yes. Freeze it in ice cube trays and take out portions as needed. Basil loses a bit of color when frozen, but the flavor holds up. It keeps in the freezer for up to 3 months.
Is pumpkin seed pesto also good on keto bread?
Yes, on keto-friendly almond flour bread or walnut bread it makes an excellent spread. The combination of pumpkin seed magnesium and almond or walnut nutrients makes for an even richer electrolyte snack.