In a large mixing bowl, add cooked diced chicken, celery, sweet relish, diced onion, hard-boiled eggs, grapes, mustard and mayonnaise.
2 cup Diced Chicken Breast, 1/4 cup Celery, 3 Hard-Boiled Eggs, 3 tablespoon Onion, 1/2 cup Sweet Relish, 1 1/2 cup Grapes, 1 teaspoon Mustard, 1/2 cup Mayonnaise, Salt and Pepper to taste.