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A whole tray of twelve Philly cheesesteak sliders with an everything-seasoned butter topping

Easy Philly Cheesesteak Sliders

Cooked shaved roast beef, provolone, peppers, and onions fill twelve dinner-roll sliders. Melt the cheese first, then finish the roll tops with everything-seasoned butter.
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Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Course Appetizer
Cuisine American
Servings 12 sliders

Equipment

  • 9×13-inch baking dish
  • Two skillets
  • Small mixing bowls
  • Pastry brush
  • Bread knife

Ingredients
  

Sliders and butter topping

  • 1 pound shaved roast beef already cooked and shaved thin
  • 2 tablespoons olive oil
  • 9 slices provolone cheese
  • 1 large bell pepper chopped
  • 1/2 cup chopped onion
  • 4 tablespoons butter divided: 2 tablespoons for vegetables and 2 tablespoons melted for the tops
  • 2 tablespoons mayonnaise
  • 1 dozen dinner rolls 12 rolls, kept connected
  • 2 tablespoons everything bagel topping from the homemade mix below; use only this measured portion

Homemade everything mix (use only 2 tablespoons)

  • 1/4 cup sesame seeds
  • 1/4 cup poppy seeds
  • 1/4 cup dried onion flakes
  • 1/4 cup black sesame seeds optional
  • 1 tablespoon garlic salt

Instructions
 

  • Preheat the oven to 350°F. In a small bowl, stir together the sesame seeds, poppy seeds, dried onion flakes, optional black sesame seeds, and garlic salt. This makes a batch; only 2 tablespoons of the mixed seasoning are used for this tray.
    Sesame seeds, poppy seeds, dried onion flakes, garlic salt, and optional black sesame seeds mixed for the topping
  • In another small bowl, stir 2 tablespoons of the melted butter with 2 tablespoons of the everything seasoning mix. Set aside. These 2 tablespoons of butter are part of the 4 tablespoons listed for the sliders.
    Sesame seeds, poppy seeds, dried onion flakes, garlic salt, and optional black sesame seeds mixed for the topping
  • In a medium skillet over medium-high heat, melt the remaining 2 tablespoons butter. Add the chopped bell pepper and onion. Cook until tender and lightly golden at the edges, stirring as needed. Set the cooked vegetables aside.
    Chopped bell pepper and onion cooked in butter until tender and lightly golden
  • Heat the olive oil in a large skillet over medium-high heat. Add the cooked shaved roast beef, separating folded slices, and turn gently until heated through and lightly browned in spots.
    Thin shaved roast beef warmed in a skillet with a few lightly browned edges
  • Carefully slice the dinner-roll slab in half horizontally, keeping the rolls connected. Put the bottom half in a 9×13-inch baking dish. Spread the mayonnaise evenly over the cut surface.
    A thin layer of mayonnaise spread over the connected bottom halves of dinner rolls
  • Arrange the warm roast beef evenly over the bottom rolls. Cover with the 9 provolone slices, overlapping as needed. Spoon the cooked peppers and onions over the cheese.
    Shaved roast beef, overlapping provolone slices, and sautéed peppers and onions layered on the bottom rolls
  • Leave the roll tops off. Bake the bottom rolls and filling uncovered at 350°F for 8–10 minutes, until the provolone has melted.
    The open-faced sliders after the first bake with melted provolone and cooked peppers and onions
  • Remove the dish from the oven and place the connected roll tops over the filling. Stir the everything butter again and brush it evenly across the tops, distributing the seeds and onion flakes.
    Connected dinner roll tops brushed with melted butter and everything seasoning before the final bake
  • Return the dish to the oven for 5 more minutes, until the roll tops are warm and golden.
    A whole tray of twelve Philly cheesesteak sliders with an everything-seasoned butter topping
  • Divide along the roll seams into 12 individual sliders and serve warm.
    One small Philly cheesesteak slider showing shaved roast beef, melted provolone, and bell pepper

Notes

The butter total is 4 tablespoons: 2 tablespoons for the vegetables and 2 tablespoons melted for the roll tops. The topping portion is not extra butter.
The homemade seasoning ingredients make a batch. Measure only 2 tablespoons of the finished mix for this tray.
One dozen connected dinner rolls makes 12 sliders. The 35-minute total is an estimate for preparation and cooking; the two oven stages take about 13–15 minutes.