Crockpot Swiss Steak

1 1/2 lbs. round steak, trimmed of fat 1 chopped carrot
1 cup chopped celery 1 can tomato sauce
1 onion, sliced 2 tbs. flour
1 tsp. salt 1/4 tsp. black pepper
1 tsp. garlic powder

Cut steak into serving pieces. Combine flour, garlic powder, salt, & pepper & sprinkle over meat. Mix well & put into crock pot. Add carrot, celery, & onion. Pour tomato sauce on top. Cook on low for 8 to 10 hours.