Portobello Mushroom Cheesesteaks

Name: Portobello Mushroom Cheesesteaks
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: American
Ingredients: 2 tbsp olive oil (divided); 2 extra-large portobello mushrooms (thinly sliced); 2 tbsp red wine; 1 small green pepper (thinly sliced); 1 large onion (thinly sliced); salt and pepper (to taste); 8 slices provolone cheese (or mozzarella); 4 sub rolls (sliced lengthwise—don't completely cut the top from the bottom, though!)