Slice ribeye steak very thin
Season the steak with salt and black pepper
Heat a skillet or griddle over high heat
Add a little oil or butter
Cook the steak quickly until browned
Chop or separate the steak into smaller pieces while cooking
Add sliced onions if desired and cook until softened
Place provolone, American cheese, or Cheez Whiz over the hot steak
Let the cheese melt
Split a hoagie roll or sub roll
Toast the roll lightly if desired
Fill the roll with the steak and cheese mixture
Add sautéed peppers or mushrooms if desired
Serve immediately