01 - Boil a generous amount of salted water in a large pot. Add pappardelle and cook until al dente, following package directions. Reserve 1/2 cup of the pasta cooking water before draining. Drain the pasta.
02 - While the pasta is cooking, place pine nuts in a dry skillet over medium heat. Toast for 2-3 minutes, stirring regularly, until golden brown and fragrant. Remove from skillet and set aside.
03 - In a blender or food processor, combine fresh basil leaves, chopped garlic, extra-virgin olive oil, salt, black pepper, and lemon zest (if using). Pulse until finely minced.
04 - In a large skillet, melt the unsalted butter over medium heat. Add the basil mixture and sauté for 1 minute, stirring constantly, until aromatic.
05 - Pour in the heavy cream and bring to a gentle simmer. Stir in the grated Parmesan cheese until fully melted and the sauce has thickened slightly, approximately 2-3 minutes. If the sauce becomes too thick, gradually incorporate small amounts of the reserved pasta water.
06 - Add the drained pappardelle to the skillet with the basil cream sauce. Toss gently to ensure the pasta is evenly coated.
07 - Plate the pasta immediately. Garnish with the toasted pine nuts, fresh basil leaves, and an extra dusting of grated Parmesan cheese.