Cook the Pasta: In a large pot, bring salted water to a boil. Add 1 lb of your chosen pasta and cook according to the package instructions until al dente, typically about 8-10 minutes. Remember to reserve 1 cup of pasta water before draining.
Make the Pesto: While the pasta cooks, prepare the pesto. In a food processor, combine 1 portion of homemade pesto, 1 cup of fresh basil leaves, 1/2 cup of grated Parmigiano-Reggiano, 1/4 cup of Pecorino Romano, 1/2 cup of toasted pine nuts, and 2 minced garlic cloves. Blend until smooth gradually adding olive oil to achieve your desired consistency.
Combine: In a large mixing bowl, combine the drained pasta with the freshly made pesto. Gradually add the reserved pasta water, a few tablespoons at a time, until the pasta is coated in the pesto and has a silky texture.
Season & Serve: Taste your dish and adjust the salt as needed. Plate the pasta and sprinkle generously with additional grated cheese, then serve immediately. Enjoy the burst of flavors and aromas!