In a gallon sized ziploc bag, add the mustard, vinegar, Worcestershire sauce and seasonings. Seal and knead the bag to combine the ingredients. Add in the sliced beef and marinate from 6 hours to overnight.

in a skillet, add in some olive oil. Then add in onion and peppers and cook until tender. Remove to a plate and set aside.

Now remove the steak from the marinade and add to the skillet. Cook undisturbed for a minute. Then stir to cook until no longer pink. This just takes a few minutes. Add the onion/peppers back in and warm.

Open hoagie rolls and place on a baking sheet. Top each roll with 2 slices of cheese. Broil until cheese is melted and rolls are toasted.

Sere rolls topped with beef mixture. Makes 4-5 sandwiches.