Steps
1. Preheat oven to 375 degrees.
2. Cut the squash in half.
Scoop out the seeds.
3. In a large skillet over medium heat, heat the olive oil.
4. Add the onions, bell pepper, garlic and mushrooms, and season with salt, pepper, chili powder and cumin.
5. Cook until onion is soft and translucent, about 5 minutes.
6. Place squash halves cut side up in a baking dish.
7. Place the cooked filler on top of each squash half.
8. Bake for 20 minutes.
9. Top with parmesan cheese and bake for an additional 5 minutes.