1. Preheat a large skillet over medium-high heat. Add the olive oil and onion and sauté until the onion is softened and lightly browned, about 5 minutes.

2. Add the steak and season with salt and pepper. Cook, stirring occasionally, until the steak is cooked through, about 5 minutes.

3. Reduce the heat to low and add the Cheez Whiz. Stir until the cheese is melted and the steak is evenly coated.

4. Divide the steak and cheese mixture among the hoagie rolls and serve.