Cheesesteaks

Ingredients:
3  tablespoons oil (plus more as needed)
2  medium red onions, sliced thin
salt and pepper
steak seasoning
2  kilos top round beef thinly sliced, semi-frozen
1/2  kilo Mozzerella cheese ( or any cheese you like), cut into thin slices
4  large rolls
Directions:
1.Heat 3 tablespoons oil in large skillet over high heat.
2.Saute onion until wilted and just starting to color, stirring frequently, about 7 minutes. Sprinkle onions with salt while cooking.
3.Slice the steak into very thin slices. (Partially freezing enables you to slice it very thin.).
4.Remove onions from skillet. Salt and pepper (and season if desired) steak slices then saute in same skillet, in batches until cooked thru, about 45 seconds per side.
Repeat process for the remaining steak slices, adding more oil as needed.
5.Meanwhile, Cut each roll in half lengthwise. Place cheese and place in oven until lightly toasted and melted. Fill each roll with steak and onions. Enjoy