Waldorf Salad 

Ingredients:
- 1 cup diced celery
- 1 cup diced cored, peeled apples
- 1/2 cup coarsely chopped walnuts
- 1/2 cup seedless red grapes, halved, optional
- 1/2 to 3/4 cup mayonnaise

Directions:
- Combine celery, apples, walnuts, and grapes in a medium bowl.
- Stir in mayonnaise.
- Serve at room temperature or chilled.