Crock Pot Rice And Hamburger a.. 2 lbs. ground beef b.. 2 onions, cut up c.. 1 can tomatoes d.. 1 can tomato soup, undiluted e.. 1 cup cooked rice Brown beef in skillet and drain. Put browned beef in crock pot; add onion, tomatoes, and soup. Cover and cook for 8 to 10 hours. Add hot cooked rice about 20 minutes before serving.