To prepare a corn and zucchini au gratin with chipotle peppers main dish recipe, you'll first need to prepare the ingredients. Peel and slice the zucchini. Cut the corn into bite-sized pieces. Place the sliced zucchini in the bottom of an 8-inch-square baking dish. Pour the cream of mushroom soup over the mixture. Sprinkle the cheese on top. Bake the dish at 375?F (190?C) for 30 minutes. Serve with sour cream.