This is my favorite roasted chicken salad sandwich recipe. I love the tender, roasted chicken countered with the crunch of onion and celery, along with the smooth mayonnaise. It is the perfect chicken salad sandwich made only better with fresh toppings.
Place the chicken in a large bowl. Add a little of the onion and celery and mix.
Add enough mayonnaise to just coat the mixture, Fold.
Add salt and pepper to taste. Add more onion, celery and salt, to taste until you have the flavor just like you like it. You'll need to add more mayo also, but not too much at a time. You don't want the mixture to get runny.
Lightly toast the buns or bread. Top with lettuce and tomato, followed by a large serving of the chicken salad. Add top bun and enjoy!