Alongside the hamburgers and hot dogs at our summer cookouts will be these vegetable pitas. Mushrooms, zucchini, bell pepper, and red onion make this sandwich hearty and satisfying, and additions like balsamic and goat cheese make it extra flavorful.
Preheat a grill to medium heat. Brush the mushrooms, zucchini, onion, and bell pepper with vinegar and oil and sprinkle with salt and pepper. Grill the vegetables, covered, until tender, about 8-12 minutes, turning once halfway through cooking (mushrooms and onions will take longest). Set vegetables aside to let cool, then roughly chop. Spread cheese in pitas and stuff with vegetables.