Gluten Free Roast Beef and Prolone Stuffed Peppers

Preheat the oven to 350 degrees. Cut peppers in half and remove seeds. Place a half slice of slice of provolone cheese at the bottom of pepper. In a skillet, saute garlic, onion, mushrooms, sliced roast beef and butter. Simmer until onions are transparent. Stuff each pepper with the roast beef mixture and place with another half slice of provolone cheese. Bake uncovered for 30 minutes.