01 -
Heat olive oil in a large skillet over medium-high heat. Add the thinly sliced onions and bell peppers (if using) and sauté for 3-4 minutes until softened. Add the sliced steak to the skillet and cook until browned, about 4-5 minutes. Season with garlic powder, Worcestershire sauce, salt, and pepper, then mix everything together. Remove from heat.
02 -
Preheat your oven to 375°F (190°C). Place the loaf of Italian bread or French baguette on a baking sheet, cut side up. (Optionally, you can spread a thin layer of mayonnaise on the cut sides of the bread for added flavor and creaminess.)
03 -
Evenly distribute the cooked steak, onions, and peppers over the cut sides of the bread. Top with a generous layer of shredded provolone and mozzarella cheese.
04 -
Place the bread in the oven and bake for about 10-15 minutes, or until the cheese is melted, bubbly, and slightly golden. You can also broil the bread for an additional 1-2 minutes to get the cheese extra bubbly and slightly crispy.
05 -
Remove from the oven and garnish with fresh parsley if desired. Slice into pieces and serve immediately.