In a bowl mix together the bay leaf, garlic, paprika, white wine vinegar, white wine, black pepper, salt and piri piri sauce.
Trim the fat from the pork cutlets (optionally reserve the fat to cook the pork in later). Slice your pork cutlets in half so each piece is about ½" thick.
Cover the cutlets in plastic wrap then tenderize the meat with a meat tenderizing hammer or the back of a frying pan. Hammer then to ¼-⅛" thick.
Place the cutlets in the marinade. Stir to coat all pieces. Marinate for 3 hours. Stir every hour to ensure all pieces of pork are in contact with the marinade.
After 3 hours remove the pork from the marinade and pat dry with a paper towel. To a medium saute pan add the olive oil. When the pan is hot add the pork cooking for 1-2 minutes on each side, depending on the thickness.
In another pan add the marinade. Bring the marinade to a bowl to kill any bacteria from the raw meat. Once at a bowl remove from the heat and set aside. This will be used as a sauce.
Deglaze the pan used to cook the meat with 1-2 tablespoons of the marinade. Place your sliced bread roll into the pan to soak up the juices.
To serve, place the pork and yellow mustard on the sliced bread roll. In a small dish place the cooked marinade and use as a dipping sauce.