01 - Combine ground chicken, chopped onion, garlic, soy sauce, grated ginger, salt, and pepper in a large bowl. Mix until ingredients are evenly distributed throughout the meat.
02 - Divide the chicken mixture into 4 equal portions. Shape each portion into a uniform patty, approximately 1/2 inch thick, ensuring even thickness for consistent cooking.
03 - Heat grill or grill pan to medium temperature. Lightly brush the grates with olive oil to prevent sticking during cooking.
04 - Place patties on the preheated grill. Cook for 5 to 6 minutes on each side until fully cooked with clear juices, reaching an internal temperature of 165°F. If adding cheese, place a slice on each patty during the final minute and cover to melt.
05 - While patties cook, place pineapple rings on the grill. Grill for 2 minutes per side until lightly caramelized with visible grill marks.
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 half of each toasted bun. Layer with lettuce, sliced tomato, cooked chicken patty, grilled pineapple ring, and red onion slices. Complete with the bun top and serve immediately.