Drizzle cheese, zucchini, and onion slices with half of the salad dressing. Sprinkle with salt and pepper.
On rack of charcoal grill place zucchini, onion slices, and a 6-inch cast-iron skillet (to heat for softening the cheese) directly over medium coals. Grill zucchini and onion for 8 minutes or until tender, turning once halfway through cooking time. Remove vegetables. Grill pita bread and tomatoes on grill rack for 2 minutes or until bread is toasted and tomatoes are lightly charred. Place cheese in hot skillet; heat for 1 to 2 minutes to soften.
To serve, cut zucchini in chunks. Drizzle cheese, vegetables, pitas, and tomatoes with honey and remaining salad dressing. Makes 4 servings.