Ingredients

  • 8 (4-inch) portobello mushroom caps (about 1 pound)
  • 4 medium red bell peppers, quartered
  • 2 medium Vidalia or other sweet onions, each cut into 4 slices (about 1 1/4 pounds)
  • Cooking spray
  • 1/2 teaspoon kosher salt
  • 1/4 teaspoon freshly ground black pepper
  • 1 1/2 tablespoons balsamic vinegar

Method

  • Prepare grill to medium-high heat.
  • Arrange mushrooms, gill sides up; bell pepper quarters; and onion slices on a baking sheet. Coat vegetables with cooking spray. Sprinkle evenly with salt and black pepper. Drizzle vinegar over mushrooms. Place vegetables on grill rack; grill 5 minutes on each side or until tender.