‘Otai is a watermelon drink from Tonga (Kingdom of Tonga), an archipelago in the southern Pacific Ocean. It is made up of over 170 islands (52 inhabited). It is the only island in the Pacific to completely resist colonization and keep its government (monarchy). This was a great drink for a hot summer day. It is very quick to prepare, just combine crushed watermelon with coconut milk and lime juice. Other variations may include mango, pineapple, or mountain apple (fekika).
More information on the Kingdom of Tonga.
My seedless watermelon was a mini, so I ended up adding the whole thing. The amount of watermelon should equal around 5 cups. This was best cold, so keep the watermelon and coconut milk in the refrigerator before making if you are going to serve it right away.