In a medium-sized mixing bowl, combine the brown sugar, soy sauce, olive oil, minced garlic, grated ginger, black pepper, and crushed red pepper flakes (if using). Whisk the mixture until well-blended.
Add the chicken breasts to the marinade, turning them to coat evenly. Cover the bowl with plastic wrap or a lid and refrigerate. Allow the chicken to marinate for at least 30 minutes, or for a more intense flavor, up to 2 hours.
Preheat your grill or a grill pan over medium heat while the chicken marinates.
Once marinated, remove the chicken from the bowl and shake off any excess marinade. Set aside the reserved marinade for later use.
Place the chicken breasts on the grill, cooking for about 6-7 minutes on each side, or until they are fully cooked and reach an internal temperature of 165°F (75°C).
While your chicken is grilling, pour the reserved marinade into a small saucepan. Over medium heat, bring the marinade to a gentle boil, then reduce the heat and let it simmer for about 5 minutes until it thickens slightly.
In the last few minutes of grilling, place the diced pineapple on the grill alongside the chicken. Grill for about 2-3 minutes until the pineapple is tender and has beautiful grill marks.
Once both the chicken and pineapple are grilled to perfection, remove them from the grill.
To present the dish, arrange the grilled chicken on a serving plate, top it with the caramelized pineapple, and drizzle the thickened marinade generously over the top. For a finishing touch, sprinkle with chopped green onions and sesame seeds for added crunch and flavor.
Notes
Serve with a wedge of lime for added flavor.
Keyword brown sugar, chicken, grilled, pineapple, tropical