1 lb. ground beef, browned and drained
1 large can refried beans
16 oz. can tomato sauce
1 pkg. taco seasoning mix
1 small onion, chopped
1 small pepper, chopped
1/2 tsp. dry mustard
1/2 tsp. chili powder
16 oz. sour cream
8 oz. grated Cheddar cheese
Tostitos

Add to drained beef and heat to boiling the refried beans, tomato sauce, taco seasoning mix, chopped onion, chopped pepper, dry mustard and chili powder. Pour into a large casserole dish. Spread with sour cream. Sprinkle top with Cheddar cheese.

Bake at 350°F for 30 minutes. Serve with Tostitos.