pinchdried red pepper flakesoptional - leave out if you don't want any spice
Instructions
Toast the pine nuts
Preheat the oven to 325' (300' convection). Spread pine nuts on a parchment-lined baking sheet and bake for 8 to 10 minutes, stirring halfway, until lightly golden and fragrant.
Make the pesto
Combine 1/2 cup of the toasted pine nuts with the basil, parmigiano reggiano, olive oil, lemon juice, garlic, lemon zest, salt, pepper and red pepper flakes in a high-speed blender or food processor until smooth. Taste and adjust salt, pepper, lemon juice or red pepper flakes if desired.
Cook pasta according to package directions in heavily salted water. Reserve 1 cup of the pasta cooking water, then drain pasta.
Toss cooked pasta with pesto, adding a splash of pasta water if needed to thin sauce.
Serve with more grated parmigiano reggiano, freshly ground black pepper, red pepper flakes and the remaining 1/4 cup toasted pine nuts.