In a large skillet over medium heat, melt 1 tablespoon butter.
1 tablespoon butter
Add the sliced onion and bell pepper. Cook for 5–7 minutes, stirring occasionally, until soft and lightly caramelized. Transfer to a plate and set aside.
1 large onion, 1 small green bell pepper
In the same skillet, heat 1 tablespoon olive oil over high heat.
1 tablespoon olive oil
Add the thinly sliced ribeye, then season with salt, pepper, and garlic powder. Cook for 2–3 minutes, stirring occasionally, until browned and slightly crispy on the edges.
1 pound ribeye steak, Salt and pepper, ½ teaspoon garlic powder
Return the onions and peppers to the skillet. Stir to combine. Lower the heat to medium-low, lay the provolone slices over the mixture, and cover the pan.
4 slices provolone cheese
Let the cheese melt for 30 seconds, then stir everything together until the cheese is evenly distributed.
Butter the hoagie rolls and toast them in a separate pan until golden and crisp.
4 hoagie rolls, 1 tablespoon butter
Fill each hoagie roll generously with the hot, cheesy steak mixture. Serve immediately and enjoy!