Using a bread knife, cut Sub Sandwich Roll in half lengthwise. (Note: Do not cut all the way through the bread.) Open up Roll and place under broiler until lightly toasted.
Chop about 2 Tablespoons of Onion.
Mince about 1 Tablespoon on Black Olives
Once Roll is toasted place on Baking Sheet. Drizzle Roll with Olive Oil, Red Wine Vinegar, Garlic Powder, Onion Powder and Crushed Dried Oregano.
Build that sandwich! Stack Roast Beef, Turkey and Pepperoni on the bottom portion of the Sub Roll.
Top with Onions and Black Olives.
Drizzle Mustard on top.
Top with Provolone Cheese.
Top Cheese with Black Pepper and Oregano. Place back under the broiler until cheese is melted and starts to bubble.
Finish off with Green Leaf Lettuce.