Cranberry Waldorf Salad

12 ounces fresh cranberries

2 cups sugar

4 medium apples, unpeeled, diced

½ cup celery, chopped

½ cup seedless red grapes, halved

½ cup walnuts, chopped

¼ cup mayonnaise

Coarsely chop cranberries. Stir in sugar. Cover and chill 4 hours. Drain cranberries for about 2 hours, reserving liquid for another use. In a large bowl, stir together the remaining ingredients and gently stir in the drained cranberries. Serves 8 or more.