01 -
Place the steak in the freezer for 30 minutes to firm up for slicing into thin strips. Trim excess fat, season with salt and pepper, and set aside.
02 -
Slice the onions and set aside. Using a serrated knife, carefully split the hoagie rolls lengthwise about 3/4 of the way through.
03 -
Mix softened butter and minced garlic, then spread the garlic butter on the cut sides of the hoagie rolls. Toast the rolls on a griddle or skillet over medium heat until golden brown. Set aside.
04 -
Heat 1 tablespoon of oil in a large skillet or griddle over medium heat. Saute the onions for 8-10 minutes until slightly caramelized. Transfer them to a bowl and set aside.
05 -
Increase the heat to medium-high, add the remaining tablespoon of oil to the pan. Once hot, evenly lay the thinly sliced steak. Cook for 2-3 minutes without moving for a sear, then flip and cook the other side. Add the sauteed onions back to the pan and stir together.
06 -
Use a spatula to divide the meat and onions into 4 portions in the pan. Top each portion with 2 slices of provolone cheese and turn off the heat. Spread a thin layer of mayo on the cut sides of the toasted hoagie rolls. Place a roll over a portion of the meat, onions, and cheese. Use a spatula to flip the meat onto the roll, completing the sandwich. Serve promptly.