8 medium summer squash, sliced 1/4 inch thick |
6 medium zucchini, sliced 1/4 inch thick |
3 red onions, cut into quarters |
1 red bell pepper, seeded and cut into thin strips |
1 orange bell pepper, seeded and cut into thin strips |
1 poblano pepper, seeded and cut into thin strips |
8 ounces button mushrooms, cut into quarters |
4 tablespoons olive oil (or more as needed to coat) |
2 tablespoons minced garlic |
1 teaspoon salt |
1/2 teaspoon black pepper |
1/4 teaspoon white pepper |
1/8 teaspoon ground cayenne pepper (or to taste) |
2 tablespoons fresh thyme (or 1 tsp dried) |
2 teaspoons fresh oregano (or 1 tsp dried) |
fresh grated parmesan cheese (optional) |
