Preheat oven to 325˚Halve the peppers and remove the seeds. Place the halves cut side up in a baking dish and bake for, 20 minutes.

Brown the Italian sausage in a large pan over a medium-high heat. Set aside a small amount of sausage to top your baked peppers later. Add the diced onion, minced garlic and sliced mushrooms into the pan. Sauté until the onions are tender and the mushrooms are brown.

Reduce the heat to medium-low and stir in the pizza sauce, Italian seasoning, salt and pepper. Bring to a simmer.

Add the olives, season with pepper and mix well.

Spoon the sausage mixture into each cooked pepper half and top each with cheese and the cooked sausage you put aside earlier. Broil the peppers until cheese is bubbly and brown.