In the pot, boil water and cook carrots, celery and pasta together for 5-7 minutes. Drain and set aside. In the skillet, brown ground beef with chopped onion. When done, drain grease. Add all ingredients (pasta, ground beef, carrots, celery, onion and spaghetti sauce) back into the pot and heat thoroughly. Salt and pepper to taste and top with Parmesan cheese. Serve with Italian bread and tossed salad.