In a large bowl combine the cooked chicken, red grapes, red onion, and celery.
3 cups cooked chicken, 1 cup red grapes, 1/2 small red onion, 2 stalks celery
In a small bowl whisk together the mayonnaise, lemon juice, salt, garlic powder, onion powder, and black pepper. Taste and add more salt and pepper to taste being careful to start out with just a little.
1/2 cup mayonnaise, 1 tablespoon lemon juice, 1/2 teaspoon salt, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, 1/4 teaspoon black pepper
Stir the dressing into the main ingredients.
Serve right away or store in an airtight container for 3 to 5 days. Please note that if this salad sits out for more than 2 hours, the leftovers should be thrown away.