2 tbsp. extra-virgin olive oil, divided
2 green peppers, thinly sliced
2 red peppers, thinly sliced
1 large yellow onion, sliced
1 1/2 lb. sirloin steak, thinly sliced
Freshly ground black pepper
8 slices provolone
4 hoagie rolls
- In a large skillet over medium heat, heat 1 tablespoon oil. Add peppers and onion and season with salt. Cook, stirring often, until caramelized, 12 to 15 minutes.
- Remove onions and peppers from skillet and set aside. Add remaining tablespoon oil and cook steak until it has almost reached your preferred doneness, about 5 minutes. Season with salt and pepper.
- Return veggies to skillet and toss to combine with steak. Blanket mixture with provolone and cook, covered, until the cheese is melted, about 3 minutes more. Divide mixture among hoagie rolls and serve.