make the easiest Philly Cheesesteak Sliders with thinly sliced beef, sautéed peppers and onions, gooey provolone cheese, and soft slider rolls baked until perfectly golden.
Preheat the oven to 350°F. Without separating the individual slider rolls, use a serrated knife to slice the entire package horizontally through the middle. Place the bottom half of the rolls into a lightly greased baking dish.
Heat olive oil in a large skillet over medium-high heat. Add the sliced onion and bell pepper. Cook for 4 to 5 minutes, stirring occasionally, until the vegetables soften and begin to brown.
Move the vegetables to one side of the skillet and add the thinly sliced beef. Cook for several minutes, breaking the meat apart as necessary, until browned. Stir the vegetables and beef together, then add the Worcestershire sauce, salt, and black pepper. Cook until most of the excess moisture evaporates. This keeps the slider rolls from becoming soggy.
Arrange half of the provolone cheese over the bottom half of the slider rolls. Spread the steak and vegetable mixture evenly over the cheese. Top the beef with the remaining provolone. Place the top half of the rolls over the filling.
In a small bowl, combine the melted butter, garlic powder, and dried parsley. Brush the mixture generously over the tops of the slider rolls.
Cover the baking dish loosely with aluminum foil. Bake at 350°F for 15 minutes. Remove the foil and bake for another 5 to 7 minutes, or until the cheese is completely melted and the tops of the rolls are golden brown.
Let the sliders rest for several minutes before slicing along the seams of the rolls. Serve warm while the cheese is gooey and melted.