Philly Cheesesteak Stuffed peppers

This dish is fantastic and naturally gluten free.

8 oz. Thinly Sliced Roast Beef

8 Slices Provolone Cheese

6 oz.  Mushrooms

2 Large Green Bell Peppers

1 Medium Sweet Onion

2 Tbs. Butter

2 Tbs. Olive Oil

1 Tbs. Garlic – Minced

Salt and Pepper – to taste