Prepare the sauce. In a large bowl, mix the pineapple juice, BBQ sauce, soy sauce, and red pepper flakes. Reserve ¼ cup of the sauce in a covered container in the refrigerator.
Marinate the chicken. Place the chicken breasts in the bowl with the sauce, coating well. Cover with plastic wrap and refrigerate for up to 1 hour. Do not marinate longer, or the chicken may become mushy.
Preheat the grill or skillet. Preheat your grill to medium high (about 375°F) or heat a skillet over medium heat.
Bring chicken to room temperature. Remove chicken from the refrigerator and let sit at room temperature for 15 minutes before cooking.
Grill the chicken and pineapple. Grill chicken for 5-7 minutes per side, or until the internal temperature reaches 165°F. At the same time, grill pineapple slices for about 2 minutes per side.
Assemble the sandwiches. Layer each bottom bun with lettuce, tomato slices, grilled chicken, bacon, pineapple, and red onion.
Add sauce and serve. Drizzle the reserved sauce over the sandwich fillings, top with the bun, and serve warm.
Notes
🥡 STORAGE
Store cooked chicken, bacon, pineapple, and sliced vegetables in separate airtight containers in the refrigerator.
Keep burger buns at room temperature in a sealed bag or container.
Assembled sandwiches should be eaten the same day for the best texture.
Leftovers are best enjoyed within 3 days.
♨️ REHEATING
Reheat chicken and bacon separately in the air fryer at 375°F for 3-5 minutes.
Microwave the chicken at 50% power for 1-2 minutes, or until warmed through.
Warm pineapple slices briefly in the microwave or on a skillet.
Toast buns lightly before assembling for the best texture.
❄️ FREEZING
Freeze grilled chicken only in a freezer-safe container for up to 2 months.
Do not freeze assembled sandwiches or fresh vegetables.
Thaw chicken overnight in the refrigerator before reheating.
💡 TIPS FOR BEST RESULTS
Do not marinate chicken for more than 1 hour to prevent it from becoming mushy.
Let the chicken come to room temperature before grilling for even cooking.
Grill the pineapple for caramelized flavor and beautiful char marks.
Add the reserved sauce just before serving to prevent the buns from getting soggy.
Use a meat thermometer to ensure the chicken reaches an internal temperature of 165°F.
🍳 ALTERNATE COOKING METHODS
Oven: Bake marinated chicken at 400°F for 18-20 minutes or until cooked through.
Skillet: Pan-sear over medium heat with a little oil, about 5-7 minutes per side.
Indoor grill pan: Works great if you do not have an outdoor grill.
♻️ LEFTOVERS
Chop leftover chicken and use it in wraps, salads, or rice bowls.
Crumble bacon over baked potatoes or add it to omelets.
Use grilled pineapple in salsas, smoothies, or as a side dish.
Refresh sandwich components by reheating separately and reassembling just before eating.