01 - In a mixing bowl, whisk together the olive oil, lime juice, cumin, smoked paprika, salt, and pepper. Add the chicken breasts and toss 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. Stir gently to combine, then cover and refrigerate to allow the flavors to meld.
03 - Rinse the jasmine rice under cold running water until the water runs clear. In a saucepan, bring the coconut milk, water, and salt to a boil. Stir in the rice, reduce heat to low, cover, and simmer for 15 minutes or until the liquid is fully absorbed. Remove from heat and fluff with a fork.
04 - Preheat a grill or grill pan over medium-high heat. 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 - Divide the coconut rice among serving plates. Arrange the sliced grilled chicken over the rice and spoon the pineapple-mango salsa generously over the top. Garnish with lime wedges and fresh cilantro sprigs. Serve immediately.