Preheat your oven to 350°F and line a large sheet pan with parchment paper. While the oven heats, prepare your mise en place: cut the chicken into 1-inch chunks, seed and dice both peppers into 1-inch pieces, cut the red onion into 1-inch wedges, and cut the pineapple into chunks (or use pre-cut if available). Having everything prepped and ready before you start cooking makes the assembly seamless and ensures even cooking throughout.
In a large mixing bowl, combine the chicken chunks with avocado oil, salt, garlic powder, and freshly grated ginger. Toss well to coat the chicken evenly—this aromatics blend will create a flavorful base layer as the chicken cooks. I find that grating the ginger fresh rather than using pre-ground gives the dish a much brighter, more authentic Hawaiian flavor that really shines through.
Spread the seasoned chicken from Step 2 onto the prepared sheet pan in a single layer. Add the diced peppers and red onion wedges around and among the chicken pieces. Drizzle the Hawaiian BBQ sauce over everything and toss gently to coat all components. Slide into the preheated 350°F oven and bake for 20 minutes, stirring halfway through if possible to ensure even cooking and sauce distribution.
Remove the sheet pan from the oven after 20 minutes and add the fresh pineapple chunks, distributing them evenly throughout the pan. Return to the oven for an additional 10-15 minutes, checking at the 10-minute mark. The chicken is done when it reaches an internal temperature of 165°F when measured with a meat thermometer in the thickest piece. I love that the pineapple adds bursts of sweetness near the end—cooking it too long would make it mushy, so timing is key.
Remove the sheet pan from the oven and let it rest for 2-3 minutes. Squeeze fresh lime juice over the entire dish, then top with chopped cilantro and toasted sesame seeds for brightness, freshness, and a subtle nutty crunch. Serve immediately over steamed rice or your favorite grain, offering extra lime wedges on the side for additional brightness.