1. Preheat oven to 400° F.
2. Arrange stuffed pasta shells in baking dish.
3. Sauté garlic, peppers, onions, Mediterranean blend, olives and mushrooms in oil over medium heat for 3 minutes.
4. Stir in broth and tomatoes.
5. Pour mixture over roll ups and top with cheeses.
6. Cover loosely with foil and bake for 1 hour.