Fajita Stew

Fajita Stew
2 1/2 lb. boneless beef top round steak
1 onion, chopped
1 14 oz. can diced tomatoes, undrained
1 1 oz. envelope fajita seasoning mix
1 red bell pepper, cut into 1 inch pieces
1 green bell pepper, cut into 1 inch pieces
1/4 C. flour
1/4 C. water
4 C. hot cooked rice
Trim excess fat from beef and cut into 2 inch pieces. Combine with onion in a slow cooker. Mix together fajita seasoning mix and undrained tomatoes and pour over beef. Place peppers on top. Cover crockpot and cook on low for 7-9 hours until beef is tender. Combine flour with water in a small bowl and stir well to mix. Add gradually to crockpot and stir well. Cover slow cooker and cook on high for 15-20 minutes until thickened, stirring occasionally. Serve stew with hot cooked rice.