Heat oil in a nonstick skillet over medium- high heat. Add onion, green pepper, and garlic; sauté 7 minutes. Add turkey; cook until turkey is browned, stirring to crumble.
Add diced tomatoes, tomato sauce, salt, and black pepper. Bring to a boil; cover, reduce heat, and simmer 20 minutes, stirring occasionally.
Add zucchini; simmer 3 minutes. Add pasta and basil; return mixture to a boil. Remove from heat. Let stand 5 minutes. Sprinkle with cheese.