Thinly sliced Deli Roast Beef is sandwiched between rolls and baked with cheese till golden and delicious.
Coat 9 x 13-inch baking dish with cooking spray. Cut rolls in half, horizontally. Place bottom halves of rolls in prepared baking dish; spread horseradish on cut side. Top with Deli Roast Beef, cheese and top halves of rolls.
Combine butter, Worcestershire sauce, parsley, sugar and onion powder in small bowl; mix to combine. Pour mixture evenly over sandwiches. Cover and refrigerate 1 hour to overnight.
Preheat oven to 350°F. Bake, uncovered, 15 to 20 minutes or until cheese is melted and rolls are golden brown.