Rinse the rice under cold running water until the water runs clear, about 2 to 3 minutes.

Combine rinsed rice, coconut milk, water, and salt in a medium saucepan and stir to combine.

Place saucepan over medium heat and bring to a gentle boil. Stir once, cover, reduce heat to low, and simmer for 15 to 18 minutes.

Remove from heat and let it rest, covered, for 5 minutes.

Fluff the rice with a fork and fold in pineapple chunks and lime juice.

Sprinkle topped coconut and garnish with cilantro if desired before serving.