In a large skillet pour in the jar of pineapples with juices and add chicken breasts. Cook over medium high heat until the breasts are no longer pink in the middle. Remove meat from skillet and discard juices.
Arrange breasts in a large casserole. Pour mesquite marinade over all the breasts. Evenly divide first mushrooms and then ham onto the top of each breast. Top each breast with a thick slice of Monterey jack cheese. Bake at 350° F for about 10 minutes or until cheese is melted. (You can also do this step in the microwave. It takes about 2 minutes on HIGH.)/p>
Submitted by: Recipe Group Member