Wash, chop, and seed your peppers into bite sized pieces.

As you cut these into bite-size pieces, cover the bottom of your greased 9x13 pan with them.

Saute your onions and mushroom with the garlic and butter until onions are transparent.

While the onions are cooking cover the peppers with 8 pieces of the provolone cheese.

When the onion and mushrooms are done layer them over the cheese.

Next cover with the roast beef and the last 8 pieces of cheese.

Bake at 350 for 40-50 minutes.  Enjoy!!