Boil chicken until it starts falling apart (about an hour or so).
Shred chicken by hand or with a stand mixer.
If not in a bowl, put the shredded chicken in a mixing bowl.
Stir in remaining chicken mixture ingredients.
Put in refrigerator while preparing the rest of the sandwich.
Spread a thin layer of mayonnaise on each slice of toasted bread.
Place some lettuce and tomato slices on one slice of bread per sandwich.
Divide the chicken mixture between the sandwiches and place on the tomatoes.
Place the mayonnaise only slice of bread on the top of the chicken mixture, mayonnaise side down.
Serve with your favorite side. We love potato chips.