01 - Whisk together the pineapple juice, soy sauce, olive oil, honey, chili powder, smoked paprika, minced garlic, grated ginger, salt, and black pepper in a mixing bowl until well combined.
02 - Place the chicken breasts in a large zip-top bag or shallow dish. Pour the marinade over the chicken, ensuring all pieces are evenly coated. Refrigerate for at least 30 minutes, or up to 4 hours for deeper flavor penetration.
03 - Preheat your grill to medium-high heat, approximately 375°F to 400°F, ensuring the grates are clean and lightly oiled.
04 - Remove the chicken from the marinade, allowing excess to drip off. Grill the chicken for 6 to 8 minutes per side until the internal temperature reaches 165°F and juices run clear.
05 - While the chicken cooks, grill the pineapple rings for 2 to 3 minutes per side until nicely caramelized with distinct grill marks.
06 - Serve each chicken breast topped with grilled pineapple rings. Garnish with thinly sliced red chili and fresh cilantro leaves if desired.