Spaghetti with Turkey Meatballs

Name: Spaghetti with Turkey Meatballs
Ingredients: 8 pounds tomatoes, cut into chunks; 1 large onion, chopped; 1/4 cup plus 1 1/2 tablespoons olive oil, divided; 5 cloves garlic, roughly chopped; 1/2 teaspoon red pepper flakes or 1 small dried hot pepper, chopped (optional); 1 tablespoon plus 1 teaspoon salt, preferably sea salt, divided; 2 cups Italian bread, torn into bite-size pieces; 3/4 cup 1 percent milk; 1 pound ground turkey (93 percent lean); 1 egg, beaten; 1/2 pound whole-wheat spaghetti; Grated Parmesan or Romano (optional)