Preheat oven to 350 degrees F.
Place the almonds on a small baking sheet and transfer to the oven for 3 to 4 minutes, or until lightly golden brown. Remove from oven and set aside to cool.
Add chicken, grapes, and celery to a large mixing bowl.
In a separate small bowl combine the dressing ingredients. Pour the dressing over the top of the chicken mixture and mix to incorporate the dressing throughout. Add the cooled almonds and mix lightly to combine.
Divide the mixture between the bread and top with tomato and green leaf lettuce.