Put challah in bowl and add some water to moisten. Brown meat in 1-2 T. oil or margarine. Remove from pan, set aside. Add 1-2 T. more oil to pan and saute onions and cabbage, til limp. Combine onions, cabbage, meat, and challah. Add 4 eggs. Stir til combined. Pour in pan. Bake at 350 for one hour.