Cook pasta according to directions
Boil and sauté onion, garlic, and ground beef until beef is browned
Stan, zucchini peppers and sauté until softened
Stirring remaining ingredients, including cooked pasta, but not the cheese
Spoon into 9 x 13 pan and sprinkle with cheese
Bake at 350° for 20 to 25 minutes or until bubbly