1. Combine 3 garlic cloves and next 4 ingredients in a bowl. Form into 1 1/2-inch meatballs. Heat 3 tablespoons oil in a 12-inch skillet or large saucepan over medium-high heat. Add meatballs, and cook 7 minutes or until browned on all sides. Transfer to a plate with a slotted spoon.
2. Pour off fat from pan, and add remaining 2 tablespoons oil. Add onion, bell peppers, and remaining garlic; season with salt and pepper, and cook, stirring occasionally, 5 minutes or until vegetables are tender. Stir in wine, and cook 1 minute. Return meatballs to pan; cover and simmer 10 minutes.
3. Cook dry pasta according to package directions; drain, reserving 1/2 cup cooking liquid. Return pasta to pot, and add pesto, meatballs, and vegetables; toss to combine. Add a little reserved pasta water, if desired. Serve with additional Parmesan.