2 tablespoons olive oil |
2 tablespoons chopped fresh parsley |
2 tablespoons chopped fresh oregano |
2 tablespoons chopped fresh basil |
1 tablespoon balsamic vinegar |
1 teaspoon kosher salt |
1/2 teaspoon black pepper |
6 garlic cloves, minced |
1 red onion |
18 asparagus spears (about 3/4 pound) |
12 cremini mushroom caps |
1 (1-pound) eggplant, cut crosswise into 16 (1/4-inch-thick) slices |
1 red bell pepper, cut into 6 wedges |
1 yellow bell pepper, cut into 6 wedges |
cooking spray |