Baked Zucchini Casserole

1 large zucchini squash, sliced or chopped
1 medium onion, chopped
1 small green pepper, diced
3 tbsp. Butter
1 lb. lean ground beef
1 pint tomatoes, peeled, seeded and chopped
2 tbsp. Flour
2 tbsp. Sugar
1 tsp. Salt
8 oz. shredded Cheddar cheese
1 cup buttered bread crumbs

Cook zucchini until just tender. Sauté onion and green pepper in butter until golden brown. Fry ground beef until slightly done. Cook tomatoes with flour, sugar and salt until clear and thick. Combine all ingredients in casserole dish, and top with Cheddar cheese and bread crumbs. Bake at 350º F for 45 minutes or until bubbly.