Rubbery shrimp: Added too early. Always add off heat in the final 60 sec. Sauce too thin: Skip the pasta water step. Add 3 tbsp before combining pasta. Grainy Parmesan: Pre-shredded used. Always grate fresh from the block off heat. Without wine: Equal stock + 1 tsp white wine vinegar. Serve with: Crusty bread, garlic bread, or green salad with lemon vinaigrette.