My brother in law and I used a homemade recipe years ago, the piece of paper upon which it was written has not been seen for about 20'odd years and is searched for still to this day. I'll do my best to recall what was in the marinade sauce we made up. Quantities I have not even the roughest of ideas.
vinegar (possibly, of this I can not be certain, it doesn't sound as if it fits but for some reason it springs to mind as being part of the recipe)
Rib fillet steak
couple tomatoes chopped up roughly
thick cut buttered slices of the bread of your choice
copious amounts of homebrew
Marinate the rib fillet in the sauce overnight, then cook in the frypan. No extra oil needed due to oil in the sauce. Set cooked steak aside to sit and then shallow fry your potato slices in a small amount of the sauce. Set potato slices aside once cooked, then combine remaining sauce and chopped tomatoes and cook until heated through in the frypan. Once done, pour over your steak, add potato slices to your plate, and have the rest of the sauce mix as an aside on your plate to dip your bread in.
Enjoy with previously mentioned homebrew and good company.
Coming in to the cooler months and now I'm back brewing this is going to be researched thoroughly.