Preheat oven to 375°F. Place chicken in an even layer on a rimmed baking sheet. Bake, flipping halfway through, until fully heated through, about 14 to 15 minutes.
Spread mayo over 4 slices of bread. Top slices with lettuce, cooked chicken, 2 slices bacon, a few slices of avocado, 2 slices tomato and remaining slices of bread. Serve and
enjoy.