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Best Roast Beef Sliders with Caramelized Onions and Mushrooms to Take to a Party

Print Recipe
Total Time 40 minutes

Ingredients
  

  • 1 package Hawaiian Sweet Rolls 12 rolls
  • 3 cups of chopped left over roast beef or 1 lb of deli sliced roast beef
  • 2 T of olive oil or butter
  • 8 oz Sharp Cheddar cheese sliced. Or shredded sharp Cheddar cheese.
  • 1 Pint of sliced mushrroms
  • 1 white onion
  • Butter Topping
  • 4 T butter melted
  • 1 tsp Dijon Mustard
  • 1 tsp Worcesteshire Sauce
  • 1 tsp brown sugar

Instructions
 

  • Preheat overn to 350.
  • Slice sweet rolls in half with a large serrated knife. You will have a top bun section and a bottom bun section, keeping the buns connected (don't pull each bun apart). Set the bottom section in an 8x13" casserole dish sprayed with cooking spray
  • Heat olive oil on stove in medium to large skillet over medium heat, add chopped onions and sliced mushrooms. Cook until golden brown and caramelized.
  • Evenly place the chopped roast beef across the bottom layer of buns
  • Add your onions and mushrooms as the second later.
  • Next, add the cheese and then cover with the top half of buns.
  • Melt 4 Tablespoons of butter in microwave in a small bowl, add mustard, worcesteshire sauch and brown sugar. Mix well, then pour over the sliders. You can use a basting brush or spatula to spread it more evenly.
  • Place in oven and cook for 10-15 mintues covered with foil. Cook an additional 10 minutes uncovered. Checking to make sure they are not bruning on the top.