01 - In a bowl, whisk together olive oil, lime juice, cumin, smoked paprika, salt, and pepper. Add chicken breasts and toss to coat evenly. Let marinate for at least 15 minutes at room temperature or up to 2 hours refrigerated.
02 - In a medium bowl, combine diced pineapple, mango, red onion, bell pepper, cilantro, jalapeño (if using), lime juice, and a pinch of salt. Stir gently until well mixed. Cover and refrigerate while preparing the rest of the meal to allow flavors to meld.
03 - Rinse jasmine rice under cold water until the water runs clear. In a saucepan, bring coconut milk, water, and salt to a boil. Stir in the rice, reduce heat to low, cover, and simmer for 15 minutes or until liquid is absorbed. Remove from heat and fluff with a fork.
04 - Preheat a grill or grill pan over medium-high heat. Remove chicken from marinade and grill for 5–7 minutes per side, or until internal temperature reaches 165°F and juices run clear. Transfer to a cutting board and rest for 5 minutes before slicing.
05 - Divide coconut rice among four plates. Fan sliced chicken over the rice and spoon pineapple-mango salsa generously over the top. Garnish with lime wedges and fresh cilantro sprigs. Serve immediately.