1 c. chopped onions
3 tbsp. butter
1 lb. ground beef
1 green pepper, diced
1 c. celery, diced
1 c. carrot, diced
4 lg. firm tomatoes, diced
3/4 tsp. salt
1/8 tsp. pepper
1 tbsp. brown sugar

Saute onions in butter. Add ground beef and brown. Add rest of ingredients. Simmer 20 minutes. Spoon into a 2-quart casserole and top with 3 cups seasoned mashed potatoes. Dot with 2 tablespoons butter and bake at 350 degrees until bubbly.