1 Preheat the oven to 350°F. Lightly butter a 9-inch (8-cup capacity) oval gratin baking dish. Add the apples, pears, cranberries, lemon juice, honey, and vanilla; mix well.2 Bake until the fruit is tender, can be 30 minutes or up to one hour. Sprinkle with walnuts and serve hot or at room temperature.