Preheat oven to 425 degrees F (220 degrees C).
Line a rimmed baking pan with foil.
Cut Boneless, Skinless Chicken Breast (3) in half lengthwise to make 6 cutlets. Brush both sides generously with barbecue sauce, using about 2 tablespoons Barbecue Sauce (12 tablespoon) per cutlet.
Arrange the Pineapple (2 cup) on top of the chicken.
In a small bowl, combine the Dark Brown Sugar (3 tablespoon) and Soy Sauce (1 tablespoon) to make a paste. Spoon the mixture evenly over the pineapple.
Bake uncovered for 20 minutes. During the last few minutes of baking, baste the chicken by spooning the pan sauce over the pineapple chicken.
Remove from oven, cover loosely with foil, and rest for 5 minutes before serving.
