Ingredients
1/4 cup olive oil2 tablespoons red wine vinegar1-1/2 teaspoons minced fresh oregano or 1/2 teaspoon dried oregano1-1/2 teaspoons Dijon mustard1 garlic clove, minced1/4 teaspoon salt1/8 teaspoon pepper2 medium zucchini, cut into 1/2-inch slices2 medium yellow summer squash, cut into 1/2-inch slices1 medium red onions, quartered1 small sweet red pepper, cut into 2-inch pieces1 small sweet yellow pepper, cut into 2-inch pieces6 to 8 whole fresh mushrooms6 cherry tomatoes
Preparation
In a jar with a tight-fitting lid, combine the oil, vinegar, oregano, mustard, garlic, salt and pepper. Place the vegetables in a shallow baking dish. Add marinade and toss to coat. Let stand for 15 minutes. Drain and discard marinade.
Arrange vegetables on a vegetable grill rack. Grill, covered, over medium heat for 10-12 minutes or until tender.