01 - Combine ground chicken, chopped onion, garlic, soy sauce, grated ginger, salt, and pepper in a large bowl. Mix thoroughly until all ingredients are evenly distributed throughout the meat.
02 - Divide the seasoned chicken mixture into 4 equal portions. Shape each portion into uniform patties approximately 1/2 inch thick, ensuring compact but not overly dense texture.
03 - Heat grill or grill pan to medium temperature. Lightly brush the cooking surface with olive oil to prevent sticking and promote even browning.
04 - Place patties on the preheated grill. Cook for 5 to 6 minutes per side until fully cooked through and juices run clear. Internal temperature should reach 165°F. If adding cheese, place slice on each patty during the final minute and cover to melt.
05 - Grill pineapple rings for 2 minutes per side until grill marks appear and fruit becomes lightly caramelized, enhancing natural sweetness.
06 - Place burger buns cut-side down on the grill for 1 to 2 minutes until golden brown and lightly crisped.
07 - Spread barbecue sauce on the bottom bun. Layer lettuce, sliced tomato, cooked chicken patty, grilled pineapple, and red onion. Cap with the top bun and serve immediately.