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 cover and refrigerate for up to 2 hours for deeper flavor.
02 - In a medium bowl, combine the diced pineapple, mango, red onion, bell pepper, cilantro, minced jalapeño (if using), lime juice, and a pinch of salt. Stir gently to combine without mashing the fruit. Cover and refrigerate while preparing the remaining components.
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 over medium-high heat. Stir in the rice, reduce the heat to low, cover tightly, and simmer for 15 minutes or until the liquid is fully absorbed. Remove from heat and let stand, covered, for 5 minutes before fluffing 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, allowing excess to drip off. Grill the chicken 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 rest for 5 minutes before slicing against the grain.
05 - Divide the coconut rice among four plates. Arrange the sliced chicken over the rice and spoon the pineapple-mango salsa generously over the top. Garnish with lime wedges and fresh cilantro sprigs. Serve immediately.