Combine coating mix and seasonings in medium bowl; stir in cheese.
Moisten chicken with water; dip chicken pieces, 1 at a time, into cheese mixture. Lightly press cheese mixture onto both sides of chicken. (Chicken will not be completely coated.)
Place on baking sheet sprayed with cooking spray; top with any remaining cheese mixture.
Bake 15 to 18 min. or until done (165F). Meanwhile, toss coleslaw with dressing.
Top tortillas with chicken, coleslaw and mangos; fold in half.