Ingredients
- 2 tbsp olive oil
- 1 red bell pepper, thinly sliced
- 1 yellow bell pepper, thinly sliced
- 1 large onion (or equivalent of smaller onions), thinly sliced
- Salt and pepper, to taste
- 1 lb shaved steak
- 4 slices provolone cheese (or 1 cup shredded mozzarella)
- 4 sub rolls, cut to open
