If not already done, cook and shred the chicken. Finely dice the celery and red onion. Slice the grapes into quarters.
In a large mixing bowl, add all of the dressing ingredients. Mix together until well combined.
Add the rest of the ingredients to the mixing bowl: shredded chicken, diced celery, onions, red grapes, and sliced almonds. Fold together.
Build the sandwiches! Add lettuce and tomatoes onto one half and ¼ of the chicken salad recipe to the other piece of bread. Fold the sandwiches together and enjoy .