01 - Combine basil leaves, pine nuts, Parmesan, and garlic in a food processor. Pulse until finely chopped. With motor running, slowly drizzle in olive oil. Add salt, pepper, and lemon juice, blend until smooth. Adjust seasoning to taste.
02 - Bring large pot of salted water to boil. Add gnocchi and cook until they float to surface, 2–3 minutes. Drain, reserving 1/4 cup cooking water.
03 - Heat 1 tbsp olive oil in large skillet over medium heat. Add spinach and sauté 1–2 minutes until just wilted.
04 - Add drained gnocchi to skillet with spinach. Pour in pesto and splash of reserved cooking water, tossing gently to coat evenly.
05 - Divide among plates and top with extra Parmesan and grind of black pepper.