Brush zucchini and corn with oil; sprinkle with salt and pepper. Place zucchini and corn on a grill rack over medium heat; close lid. Grill zucchini until tender, 2-3 minutes on each side. Grill corn until tender, 10-12 minutes, turning occasionally. Cut corn from cobs; cut zucchini slices in half., Preheat griddle over medium heat. Sprinkle 5 tortillas with cheese, add zucchini and corn; top with remaining tortillas. Place on griddle; cook until golden brown and cheese is melted, 1-2 minutes on each side. Cut each quesadilla into 4 wedges. If desired, drizzle with honey.