For the steak and vegetables
01 -
1 1/2 lb (680 g) ribeye or sirloin steak, very thinly sliced
02 -
1 tablespoon vegetable oil, plus more as needed
03 -
1 large yellow onion, thinly sliced
04 -
1 green bell pepper, thinly sliced
05 -
1 red bell pepper, thinly sliced
06 -
8 oz (225 g) cremini mushrooms, sliced
07 -
1 teaspoon kosher salt, divided
08 -
1/2 teaspoon black pepper
09 -
1/2 teaspoon garlic powder
For the cheese and rolls
10 -
4 large hoagie rolls, split but not cut all the way through
11 -
8 slices provolone cheese
12 -
1 cup (240 ml) warm cheese sauce or Cheez Whiz-style sauce
13 -
1/4 cup pickled jalapenos or banana peppers, optional
14 -
2 tablespoons unsalted butter, softened