Beef Kabobs

1 pound beef sirloin, cut into 1/4 inch strips
1 large onion, cut into 1/4 inch strips
1 large bell pepper, cut into 1/4 inch strips
1 14 1/2 ounce can Italian style stewed tomatoes
1 6 ounce can tomato paste
garlic powder, to taste
onion powder, to taste
Worcestershire sauce

Place beef in crockpot and season with garlic powder, onion powder and Worcestershire sauce.

Add onion, bell pepper, stewed tomatoes and tomato paste. Mix well.

Cook on low between 8 and 10 hours, stirring every 2 hours. Serve over rice or noodles.