01 - In a mixing bowl, whisk together the pineapple juice, soy sauce, brown sugar, olive oil, minced garlic, grated ginger, and black pepper until the sugar dissolves and the mixture is smooth.
02 - Place the chicken breasts in a large zip-top bag or shallow dish. Pour the marinade over the chicken, ensuring each piece is thoroughly coated. Seal the bag or cover the dish and refrigerate for at least 1 hour, or up to 4 hours for more pronounced flavor.
03 - Preheat your outdoor grill or grill pan to medium-high heat, approximately 400°F (200°C). Lightly oil the grates to prevent sticking.
04 - Remove the chicken from the marinade and discard the used marinade. Pat the chicken breasts lightly with paper towels to remove excess moisture for better searing.
05 - Place the chicken breasts on the preheated grill. Cook for 6 to 7 minutes per side, or until the internal temperature reaches 165°F (74°C) when checked with a meat thermometer.
06 - During the last 2 minutes of grilling, add the pineapple rings directly to the grill. Cook until distinct grill marks appear and the pineapple caramelizes slightly, then flip once.
07 - Transfer the grilled chicken to serving plates and top each breast with a grilled pineapple ring. Garnish with chopped fresh cilantro and serve with lime wedges on the side.