Ultimate Roast Beef Sandwich

Ultimate Roast Beef Sandwich

Prep Time

20 Mins


Makes 4 sandwiches


1/2 cup mayonnaise
1 teaspoon dijon mustard
1/2 teaspoon horseradish

4 sub rolls or ciabatta rolls
1 whole green bell pepper sliced in thin strips
1 large white onion sliced in thin strips
1/2 teaspoon Italian seasoning
1 pound Prime Fresh Roast Beef (two packages)
1 packet au jus seasoning
1 package sliced provolone cheese

How To Make


  • In a small container with a lid, stir in mayo, horseradish and Dijon mustard. Stir until mixed together, then cover and refrigerate until ready to assemble the sandwiches.


  • Heat a skillet over medium-high heat. Put 1 tablespoon oil in the pan. Add peppers and onions, stirring frequently with a flat spatula.
  • After about 8-9 minutes, or when softening and turning golden, season with Italian seasoning.
  • Remove from heat and set aside until ready to assemble.


  • Prepare the au jus as directed on package in a saucepan. You’ll need room to add roast beef, so use a medium to large sized one.
  • Once au jus is heated through, add meat with tongs. Turn off heat and stir so meat is all covered.
  • Preheat the oven to 350º. Line a cookie sheet with foil and coat with cooking spray.
  • To assemble: Spread mayo on bottom half of the roll. Add 2 slices of provolone cheese to each roll. Take the meat out of the au jus with tongs and place 4-6 slices on each roll. Top with peppers and onions.
  • Bake open faced for 4-6 minutes, until cheese is melted.
  • Ladle au jus in a small dish for dunking. Serve sandwich immediately.