01 - In a mixing bowl, whisk together the pineapple juice, soy sauce, olive oil, honey, chili powder, smoked paprika, minced garlic, grated ginger, salt, and black pepper until well combined.
02 - Place the chicken breasts in a large zip-top bag or shallow dish. Pour the marinade over the chicken, sealing the bag or covering the dish, and ensure all pieces are evenly coated. Refrigerate for at least 30 minutes, or up to 4 hours for deeper flavor penetration.
03 - Preheat your outdoor grill or grill pan to medium-high heat, approximately 400°F. Clean and lightly oil the grates to prevent sticking.
04 - Remove the chicken from the marinade, allowing any excess to drip off. Discard the remaining marinade. Place the chicken on the grill and cook for 6 to 8 minutes per side, until the internal temperature reaches 165°F and juices run clear when pierced.
05 - While the chicken cooks, place the pineapple rings on the grill. Cook for 2 to 3 minutes per side until distinct grill marks appear and the pineapple is caramelized and slightly softened.
06 - Transfer the grilled chicken to serving plates and top each breast with a caramelized pineapple ring. Garnish with thinly sliced red chili and fresh cilantro leaves as desired. Serve immediately.