01 - In a medium bowl, whisk together the pineapple juice, soy sauce, honey, minced garlic, grated ginger, rice vinegar, olive oil, and black pepper until well combined.
02 - Place the chicken breasts in a large zip-top bag or shallow dish and pour the marinade over them. Seal and refrigerate for at least 15 minutes, or up to 2 hours for deeper flavor penetration.
03 - Rinse the jasmine rice under cold running water until the water runs clear. Combine the rinsed rice, coconut milk, water, and salt in a medium saucepan. Bring to a boil over medium-high heat, then reduce to low, cover tightly, and simmer for 15 minutes. Remove from heat and let stand, still covered, for 10 minutes. Fluff gently with a fork before serving.
04 - Heat a large skillet or grill pan over medium heat. Remove the chicken from the marinade, reserving the leftover marinade. Sear the chicken for 5 to 6 minutes per side until golden brown and cooked through to an internal temperature of 165°F.
05 - Pour the reserved marinade into a small saucepan and add the diced pineapple. Bring to a boil, then reduce to a simmer and cook for 3 to 5 minutes until the sauce thickens slightly and coats the back of a spoon.
06 - Slice the cooked chicken breasts and arrange over a bed of coconut rice. Drizzle generously with the reduced pineapple sauce. Garnish with sliced green onions and sesame seeds if desired.