• You will also need: Large baking sheet, parchment paper
• Preheat the oven to 300°F.
• Season the sliced steak with the salt, garlic powder and black pepper, stir well to distribute the seasoning.
• Heat the oil in a large skillet over high heat. When the oil is hot and shimmering, add the sliced steak. Arrange it around the skillet so that it is in one layer.
• Cook the steak, without disturbing, for 3 minutes.
• Stir the sliced steak and arrange in one layer again. Continue cooking for 1-3 minutes or until the liquid is gone and the steak is sizzling and browned. Stir occasionally, arranging it in one layer after each stir.
• Lower the heat to medium and pile the steak to one side of the skillet.
• Add the onions to the empty space. Cook the onions for approximately 2-3 minutes or until they soften and are cooked to your liking. Stir them frequently by moving them around in their space without disturbing the meat. We’ll mix everything together when the onions are cooked.
• Combine the steak with the onions and cook for 1 minute, stirring constantly
• Take the skillet off the heat.

Make the sandwiches

• Line a baking sheet with parchment paper. Place 2 cheese triangles (one slice) on the bottom of each bun.
• Divide the steak and onions into 4 portions. Next, add a portion of steak and onions to each bread and top with 2 pieces of cheese (one slice).
• Place the steak sandwich on the baking sheet. Bake the sandwiches 5-8 minutes or until the cheese is melted and the bread is toasty on the edges.
• Serve and enjoy with chips, fries or your favorite side dish.