Steps
1. Preheat the oven to 375°F (190°C). Remove the stems from the mushrooms and set aside.
2. In a bowl, combine the cooked pasta, shredded cheese, chopped olives, diced tomatoes, salt, and pepper.
3. Stuff each mushroom cap with the pasta mixture and place them on a baking sheet.
4. Bake for about 15-20 minutes, or until the mushrooms are tender and the cheese is melted and bubbly.
5. Serve hot and enjoy!