Tender sliced steak with melted cheese on a toasted sub roll delivers a high protein, carnivore-friendly lunch. This hearty sandwich is a family go-to for satisfying big appetites.
Slice the ribeye steak thinly against the grain for tenderness, and let it rest at room temperature for 15 minutes before cooking.
Heat 1 tbsp of olive oil in a large skillet over medium-high heat. Add sliced onions and green bell peppers and sauté for 4–6 minutes until softened and slightly browned, stirring occasionally. Transfer vegetables to a plate.
Add the remaining 1 tbsp olive oil to the hot skillet. Increase heat to high, then add the steak in an even layer. Cook undisturbed for 2 minutes to achieve browning, then toss and cook for another 2–3 minutes until just cooked.
Season steak with salt, black pepper, and garlic powder. Add the sautéed onions and peppers back to the pan and mix everything together over medium heat for 1 minute.
Divide the mixture into four sections in the skillet. Lay two provolone slices over each and allow to melt, covering the pan for 1 minute if needed.
Split and lightly toast the sub rolls under a broiler or on a skillet for 1–2 minutes. Use a spatula to lift each cheesy steak portion onto a toasted roll. Serve immediately.