Place the cubed fish in a large bowl.
Pour the freshly squeezed lime or lemon juice over the fish, ensuring it is fully submerged.
Cover and refrigerate for about 30 minutes to 1 hour, or until the fish turns opaque and is "cooked" by the citrus juice.
While the fish is marinating, prepare the chopped red onion, cucumber, tomato, red bell pepper, and chilies (if using).
Once the fish is ready, drain off some of the excess lime or lemon juice, leaving a little to maintain the tangy flavor.
Add the coconut cream, chopped red onion, cucumber, tomato, red bell pepper, chilies, and cilantro to the bowl with the marinated fish.
Season the mixture with salt and black pepper to taste.
Gently mix everything together until well combined.
Transfer the kokoda to a serving dish.
Enjoy your meal!