1/2 lb. lean ground beef
1/2 c. chopped onion

Mix in 2 quart microwave bowl. Cook on high 5 minutes. Stir every 3 minutes. Remove meat and drain off drippings. Place back into 2 quart bowl, add remaining ingredients.

1/2 c. catsup
1/2 c. barbecue sauce
1/2 c. water
1 1/4 tsp. vinegar
1 tsp. Worcestershire sauce

Mix well and micro cook on high 10 minutes. Serve on toasted hamburger buns.