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, blending until smooth. Adjust seasoning to taste.
02 - Bring a large pot of salted water to boil. Add gnocchi and cook according to package directions until they float to surface, approximately 2-3 minutes. Drain thoroughly, reserving 1/4 cup cooking liquid.
03 - While gnocchi cooks, 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 sauce and splash of reserved cooking water. Toss gently until evenly coated.
05 - Divide among serving plates. Top generously with extra grated Parmesan and freshly ground black pepper. Serve immediately.