| 1 teaspoon chopped fresh oregano or 1/2 teaspoon dried |
| 1 large (12 ounces) zucchini sliced into 1/4-inch rounds |
| 1 large (12 ounces) yellow squash, sliced into 1/4-inch rounds |
| 1 red onion, peeled and cut into 1/4-inch round pieces |
| 8 to 10 ounces mushrooms, trimmed, wiped clean and sliced vertically in half, or quarters, if large |
| 1 red bell pepper, seeded and cut into 1/2-inch strips |
| 1 green bell pepper, seeded and cut into 1/2-inch strips |
| 1 pound dry rigatoni pasta |
| 1/4 cup chopped fresh basil |
| 1 cup grated parmesan cheese |