Marinate the Chicken: In a bowl, combine barbecue sauce, pineapple juice, soy sauce, minced garlic, minced ginger, and Sriracha. Add the chicken breasts, ensuring they are well-coated. Cover and marinate in the refrigerator for at least 30 minutes.
Grill the Chicken: Preheat your grill to medium-high heat. Remove the chicken from the marinade and grill for 6-7 minutes on each side, or until fully cooked and juices run clear. During the last few minutes of grilling, add the pineapple slices to the grill to caramelize.
Assemble the Sandwiches: Toast the reduced calorie hamburger rolls on the grill for a minute or two. Layer the grilled chicken on the bottom half of each roll, followed by grilled pineapple, sliced red onion, jalapeno, and a handful of greens.
Serve: Place the top half of the roll on each sandwich and serve immediately. Enjoy the burst of tropical flavors in every bite!