Seed pesto: using edible kernels for a smooth herb sauce

COOK IT AT HOME

Parsley and Toasted Pumpkin Seed Pesto

Edible pumpkin seed kernels make a substantial pesto without tree nuts, although ingredient labels and cross-contact still matter for anyone with allergies. Toasting the seeds brings a rounded flavor, while parsley and lemon keep the sauce bright. This is a fresh refrigerated herb sauce, not an oil preserve. The recipe makes enough to dress a pound of pasta lightly or to use in smaller spoonfuls on vegetables and sandwiches.

Makes

About 1 cup; 8 condiment servings

Prep

15 minutes

Cook

5 minutes

Additional time

Cool seeds for 10 minutes

A home-kitchen recipe to accompany this guide. Ingredient brands and equipment can change cooking times; use the texture and doneness cues below.

Ingredients

• 1/2 cup raw shelled pumpkin seed kernels
• 1 1/2 cups packed flat-leaf parsley leaves and tender stems
• 1 small garlic clove
• 2 tablespoons fresh lemon juice
• 1 teaspoon lemon zest
• 1/3 cup extra-virgin olive oil
• 1/4 cup finely grated Parmesan
• 1/4 teaspoon fine salt
• 1/8 teaspoon black pepper

Step-by-step method

1. Toast pumpkin seed kernels in a dry skillet over medium-low heat for 4–5 minutes, stirring, until fragrant and lightly golden. Some may pop gently. Transfer to a plate and cool for 10 minutes.
2. Wash and dry the parsley thoroughly. Place cooled seeds and garlic in a food processor and pulse to coarse crumbs. Add parsley, lemon juice, lemon zest, salt, and pepper.
3. Pulse several times, scraping the sides, until the herbs are finely chopped. With the processor running briefly, drizzle in the olive oil until a thick sauce forms. Stop before the mixture becomes warm.
4. Fold in Parmesan with a spoon. Taste on a small piece of bread or a vegetable rather than straight from the processor, then transfer to a clean covered container.
5. To use with pasta, loosen each 1/4 cup pesto with 1–2 tablespoons warm pasta water before tossing off the heat. For sandwiches or roasted vegetables, use it thick directly from the container.

Helpful tips & substitutions

• Use shelled edible kernels, not tough whole seeds intended for cracking and discarding the shell. Sunflower kernels can replace pumpkin kernels by the same volume.
• For a dairy-free version, omit Parmesan and use 2 tablespoons nutritional yeast; taste before adjusting salt. This changes the flavor but retains the thick texture.

Storage & make-ahead

Refrigerate immediately at 40°F or below and use within 3 days. Fresh garlic and herbs in oil must not be stored at room temperature. Freeze small portions for up to 2 months and thaw in the refrigerator.

How to serve it

Spoon onto roasted carrots, stir into cooked white beans, or spread lightly in a grilled vegetable sandwich. The seed flavor is especially good with sweet roasted squash.