Step 1: Season the Steaks. Pat the steaks dry with paper towels. Season generously on both sides with salt and black pepper.
Step 2: Prepare the Garlic Bread. Preheat your oven to 400°F (200°C). In a small bowl, combine the softened butter, minced garlic, chopped parsley, and optional Parmesan cheese. Slice the baguette lengthwise or split the ciabatta rolls. Spread the garlic butter evenly over the cut sides of the bread.
Step 3: Bake the Garlic Bread. Place the buttered bread cut-side up on a baking sheet. Bake for 8-10 minutes, or until golden brown and fragrant. Keep an eye on it to prevent burning. This forms the delicious base of your Garlic Bread Steak Sandwich.
Step 4: Cook the Steaks. While the garlic bread bakes, heat the olive oil in a large cast-iron skillet or heavy-bottomed pan over medium-high heat until shimmering. Add the seasoned steaks and sear for 3-4 minutes per side for medium-rare, or longer to your desired doneness. For the perfect Garlic Bread Steak Sandwich, a good sear is key.
Step 5: Rest and Slice the Steaks. Remove the steaks from the skillet and let them rest on a cutting board for 5-10 minutes. This allows the juices to redistribute, keeping the steak tender. Slice the steaks thinly against the grain.
Step 6: Assemble the Sandwiches. Arrange the garlic bread halves on the baking sheet. Layer 2 slices of provolone cheese on each bottom half. If using, add sautéed onions or mushrooms over the cheese. Top with a generous amount of sliced steak. Place the remaining 2 slices of provolone cheese on top of the steak.
Step 7: Melt the Cheese. Return the sandwiches to the oven for 2-3 minutes, or until the cheese is melted and bubbly. Carefully remove from the oven, top with the other half of the garlic bread, and serve your ultimate Garlic Bread Steak Sandwich immediately. Enjoy every delicious bite of your homemade Garlic Bread Steak Sandwich!