To Prepare Chicken ahead of time you can bake or fry with butter several boneless chicken breasts and shred OR purchase a store bought rotisserie chicken already baked, remove all skin and shred chicken. Take your shredded chicken and add salsa to it; mix together and keep warm (not hot). Set aside.
Spread each tostada shell with a layer of cream cheese, top with chicken mixture, lettuce, tomato and cheese.
Top with more salsa, sour cream and hot peppers, if desired!