Lemon Basil Gnocchi with Zucchini

Bahan-bahan (2 porsi)

• 1 (1-pound) package of uncooked gnocchi
• 4 tablespoons butter, divided
• 2 large zucchini (about 1.5 pounds), diced
• 4 cloves garlic, minced
• juice of 1 medium lemon
• 2/3 cup freshly-grated Parmesan cheese, plus extra for topping
• 2/3 cup roughly-chopped fresh basil leaves, plus extra for topping
• fine sea salt and freshly-cracked black pepper