Whisk together the chipotle mayonnaise and sour cream and set aside. Prep all the ingredients.
Cut focaccia bread in half, crosswise. Spread a generous amount of the chipotle spread over each side. Top in the following order; chicken pieces, tomatoes, onion, fresh basil and cheese.
Grill whole on a panini press over hi heat until cheese melts. Cut each focaccia into 4 pieces and serve.
