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.
02 - Divide the chicken mixture into 4 equal portions. Shape each portion into a uniform patty, approximately 0.75 inch thick, ensuring even edges for consistent cooking.
03 - Heat grill or grill pan over medium heat. Lightly brush the grates with olive oil to prevent sticking.
04 - Place patties on the preheated grill. Cook for 5-6 minutes per side until fully cooked and juices run clear. Internal temperature should reach 165°F. If adding cheese, place slices on patties 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 1-2 minutes until golden brown and lightly crispy.
07 - Spread barbecue sauce on the bottom half of each toasted bun. Layer with lettuce, tomato slices, grilled chicken patty, caramelized pineapple ring, and red onion slices. Complete with the top bun.
08 - Serve immediately while hot, accompanied by sweet potato fries or coleslaw if desired.