Step 1: Prepare the Ingredients
If slicing the steak yourself, place it in the freezer for 30 minutes for easier slicing.
Slice the onion, mushrooms, and bell pepper if using.
Step 2: Toast the Hoagie Rolls
Heat a skillet over medium heat.
Butter the inside of each hoagie roll and toast until golden brown. Set aside.
Step 3: Cook the Steak
Heat oil in a large skillet or griddle over medium-high heat.
Add the sliced steak, season with salt, pepper, garlic powder, and Worcestershire sauce.
Cook for 3-5 minutes, stirring occasionally, until browned.
Step 4: Sauté the Vegetables (If using)
Push the steak to one side of the skillet and add onions, mushrooms, and bell peppers.
Sauté until soft and slightly caramelized, about 5 minutes.
Step 5: Melt the Cheese
Spread the steak evenly in the pan and place cheese slices on top.
Let the cheese melt for 1-2 minutes, then mix everything together. (If using Cheez Whiz, heat it separately and drizzle over the steak later.)
Step 6: Assemble the Sandwiches
Spoon the cheesy steak mixture into the toasted hoagie rolls.
Serve immediately and enjoy!