Rach's favorite use for leftover leafy carrot tops is to turn it into this yummy pesto.
Place carrot tops, tarragon, parsley, garlic, nuts (reserving 2 tablespoons for garnish), lemon juice, salt, pepper and cheese in a food processor. Pulse chop into finely chopped mixture then stream in EVOO until pesto begins to pull away from sides of food processor. Transfer to serving bowl.
Bring water to a rolling boil for the pasta; salt the water and cook pasta to al dente. Reserve about 1 cup of starchy water just before draining the pasta.