01 - Bring a large pot of salted water to a rolling boil.
02 - Combine basil, garlic, pine nuts, and Parmesan in a food processor. Pulse until coarsely chopped. With motor running, gradually stream in olive oil until smooth and creamy. Season with salt, pepper, and lemon juice if using. Set aside.
03 - Add gnocchi to boiling water and cook according to package directions, typically until they float to surface, 2-3 minutes.
04 - Drain gnocchi in a colander, reserving a small amount of cooking water for sauce adjustment.
05 - Transfer hot gnocchi to a large bowl and toss with prepared pesto. Add splash of reserved cooking water if needed for silkier consistency. Serve immediately, garnished with additional Parmesan, fresh basil leaves, and extra pine nuts if desired.