Place fresh herbs, garlic, pistachios, ricotta and salt in a food processor, pulse until just blended. With the motor running, slowly pour in olive oil until blended. Set aside
Fill (4L) casserole with water and bring to a boil. Season with 1 tsp salt and add in gnocchi. Cook for 2-3 minutes or until pillowy soft.
Reserve 1 cup water and drain. Place gnocchi back in casserole and stir in pesto. Add enough reserved water for your desired creaminess
Stir in lemon juice and top with grated parmigiano regianno.