1. Fry bacon until crisp.
2. Remove from pan and drain.
3. In the bacon grease, fry the onion, green pepper and mushrooms.
4. Add the hamburger and cook until brown.
5. Add the tomatoes, salt, sugar and spaghetti.
6. Pour into a greased 1 quart casserole dish.
7. Sprinkle with cheese.
8. Bake for 30 minutes at 350.
9. Garnish with crumbled bacon and parsley.