Individual steaks, 1/2-inch thick or less
1 cup soy sauce
1 cup Worcestershire sauce
1/4 cup vinegar
2 tablespoons granulated sugar
1 large can mushrooms
Punch both sides of each steak well with a fork, then marinate for 24 to 36 hours in a marinade made by combining soy sauce, Worcestershire sauce, vinegar and sugar.
Simmer steaks on a low fire for 10 minutes in the marinade. Remove them and place steaks in a 350 degree F oven for 10 to 20 minutes, depending on thickness of meat. Three minutes before removing steaks, place a pineapple slice on each.
To make gravy, slowly saut