Creating Hawaiian Chicken BBQ is straightforward if you follow these simple steps:

1. Prepare the Marinade: In a medium bowl, whisk together the pineapple juice, soy sauce, brown sugar, apple cider vinegar, ginger, garlic, black pepper, salt, and crushed red pepper flakes.
2. Marinate the Chicken: Place the chicken breasts in a large resealable bag or shallow dish. Pour the marinade over the chicken, ensuring each piece is well coated. Seal the bag or cover the dish and refrigerate for at least 1 hour.
3. Preheat the Grill: Preheat your grill to medium-high heat. Make sure the grates are clean and lightly oiled to prevent sticking.
4. Prepare Pineapple: If using fresh pineapple, cut it into chunks or slices for grilling.
5. Grill the Chicken: Remove the chicken from the marinade, allowing excess marinade to drip off. Place the chicken on the grill and cook for about 5-7 minutes on each side, or until the internal temperature reaches 165°F (75°C).
6. Grill the Pineapple: During the last few minutes of cooking, add the pineapple chunks to the grill. Cook until they are caramelized and have grill marks, about 2-3 minutes.
7. Let it Rest: Once cooked, remove the chicken and pineapple from the grill. Allow the chicken to rest for a few minutes before slicing.
8. Serve: Slice the chicken and serve it with the grilled pineapple on the side.

These steps will guide you in creating an incredible Hawaiian Chicken BBQ that will surely impress!