Slice onions put into 9x13 pan lay steaks on top
Mix ketchup brown sugar (equal amounts)and soy sauce (about half of other ingredients) pour over to cover slices and bake on 350 for about 3 hours. Make sure meat is covered with liquid the whole time and it stays soft.
Use pan size according to how many slices you need.
If I need 2 layers I put more onions in between layers sometimes also on top so it has a covering and stays soft.