8 ounces/225 S garlic scapes (2 to 3 bunches)
1 cup/20 g packed arugula leaves
1/2 cup/70 g pine nuts, toasted
1/4 cup/25 g grated Parmesan cheese
1/4 cup/60 ml olive oil, plus more as needed
Salt and freshly ground black pepper

Chop the garlic scapes into l-inch/2.5 cm lengths and combine them with the arugula leaves, toasted pine nuts, and Parmesan cheese in the bowl of a food processor. Pulse until a paste begins to form. Remove the lid and scrape down the bowl, if necessary. Once you’ve gotten to a chunky paste, slowly stream in the 1/4 cup/60 ml of olive oil with the motor running and process until well combined. Taste and adjust the seasoning to taste. Pack the pesto into a half-pint/250 ml jar (if you’re freezing it, try dividing it between 2 quarter-pint/125 ml jars). Cover with a thin layer of olive oil (it keeps out the oxygen and prevents the top of the pesto from browning) and either refrigerate or freeze. It will keep in the refrigerator for at least a week, or in the freezer for up to a year.