01 - In a mixing bowl, whisk together the olive oil, lime juice, ground cumin, smoked paprika, salt, and pepper. Add the chicken breasts and turn to coat evenly. Allow to marinate for at least 15 minutes at room temperature or refrigerate for up to 2 hours for deeper flavor.
02 - In a medium bowl, combine the diced pineapple, diced mango, finely chopped red onion, diced red bell pepper, chopped cilantro, minced jalapeño (if using), lime juice, and a pinch of salt. Toss gently to combine, then cover and refrigerate until ready to serve.
03 - Rinse the jasmine rice under cold running water until the water runs clear. In a medium saucepan, bring the coconut milk, water, and salt to a boil over medium-high heat. Stir in the rice, reduce the heat to low, cover tightly, and simmer for 15 minutes until the liquid is absorbed. Remove from heat and fluff gently with a fork.
04 - Preheat a grill or grill pan over medium-high heat and lightly oil the grates. Remove the chicken from the marinade and grill for 5 to 7 minutes per side, or until the internal temperature reaches 165°F and juices run clear. Transfer to a cutting board and let rest for 5 minutes before slicing against the grain.
05 - Spoon a portion of coconut rice onto each plate. Arrange sliced grilled chicken over the rice and generously spoon the pineapple-mango salsa on top. Garnish with lime wedges and fresh cilantro sprigs. Serve immediately.