2 1/4 c. chicken (cubed, cooked breast meat)
3/4 c. grapes (halved)
3/4 c. celery (chopped)
1/2 c. walnuts (chopped)
1 1/2 tbsp. horseradish
1 1/2 tbsp. white vinegar
3/4 c. mayonnaise

Put first four ingredients in a bowl. Mix the dressing (remaining ingredients). Pour over and mix well.