• 3 tablespoons oil (plus more as needed)
  • 2 medium red onions , sliced thin
  • salt and pepper
  • 2 lbs top round beef , semi-frozen
  • 1/2 lb Fontina cheese , cut into small cubes
  • 4 hoagie rolls
  • 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.
  • 5 Salt and pepper (and season if desired) steak slices then saute in same skillet, in batches until cooked thru, about 45 seconds per side.
  • 6 Repeat process for the remaining steak slices, adding more oil as needed.
  • 7 Meanwhile, melt the cheese cubes in a microwave-safe bowl on low power for a couple of minutes or until completely melted. (Actually do this right before assembly, cuz the cheese cools off too quickly.).
  • 8 Cut each roll in half lengthwise. Fill each roll with steak, onions and melted cheese.
  • 9 Enjoy!