3 lb. lean beef stew meat
3 green peppers, chopped
1/2 c. brown sugar
1/4 c. vinegar
1 (6 oz.) can tomato paste
2 tsp. salt
2 tsp. Worcestershire sauce
2 tsp. powdered mustard
2 c. chopped onion

Place all ingredients in a crock-pot and cook for 12 hours on low or 8 hours on high.