01 - Bring a large pot of salted water to a boil. Cook the pasta until al dente according to package instructions. Reserve 1 cup of pasta water, then drain the pasta.
02 - Toast the pine nuts in a dry skillet over medium heat, stirring frequently until golden and fragrant, about 2–3 minutes. Set aside.
03 - In a food processor, combine the peas, mint, basil, ⅓ cup pine nuts, Parmesan, garlic, and salt. Pulse until finely chopped.
04 - With the processor running, drizzle in the olive oil and lemon juice. Process until smooth, scraping down the sides as needed. If the pesto is too thick, add 1–2 tablespoons reserved pasta water until desired consistency is reached.
05 - Return the drained pasta to the pot. Add the pesto and toss to coat, adding reserved pasta water a little at a time until the sauce evenly coats the pasta.
06 - Serve immediately, topped with extra pine nuts, black pepper, and more Parmesan. Garnish with reserved peas if desired.