1. Slice your hoagie rolls about 3/4 of the way through. Now generously spread butter on both sides. Heat a griddle or a pan over medium heat, and toast the buns until golden. Set aside.

2. Add 1 Tbsp. of oil to the pan and sautee 1 large diced onion until dark golden brown, and caramelized. Remove the onions from heat, and transfer them to a bowl.

3. Turn heat to high, and cook 14 oz. of shaved steak. Cook on one side for about 2 minutes, then flip and season with salt and pepper, and cook for another 2 minutes. Once the steak is fully cooked, stir back in the onions.

4. On the griddle, divide the meat into 4 portions, and on top, place 2 slices of cheese on each portion. Let the cheese melt for a minute.

5. Meanwhile, spread mayonnaise over both toasted sides of the rolls. Once the cheese is fully melted, place each portion into the bun, and now you’re ready to serve!