Oceania → Tonga → Tongatapu
🥤 DRINK

'Otai

A chilled Tongan cooler of hand-grated watermelon and tropical fruit loosened with sweet coconut milk.
Tongan · easy · serves 6
prep 20 min · cook 0 min
~195 cal · 2g protein · 18g carbs · 14g fat · 2g fiber · 16g sugars · 13g sat fat (estimated, per serving)
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Bowl of pink watermelon otai with coconut milk and ice
AI-generated illustration
'Otai is Tonga's festive fruit cooler, the drink that appears at every feast, church gathering, and family Sunday, ladled from a big bowl to cool a crowd in the tropical heat. At its heart is watermelon, grated or crushed by hand so the fruit half-melts into its own pink juice.
To that base go other tropical fruits, most often grated mango or crushed pineapple, and then , which turns the whole thing creamy, sweet, and pale. It is sweetened lightly and served ice-cold, sometimes thinned with a little water depending on how much fruit is going around.
Refreshing, fragrant, and gently rich, 'otai is generosity in a bowl, made in large batches precisely because it is meant to be shared. Because it is built on , it is not nut-free, but it needs no dairy at all to taste indulgent.
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Make it yours

✓ Naturally vegetarian, vegan and gluten-, dairy-, egg- and pork-free. No swaps needed.
Toggle a diet and the ingredients rewrite themselves with regional substitutes.
Dietary labels are a cooking guide, not allergen-safety advice. We track dairy, egg, gluten, tree nuts and peanuts (we count coconut as a tree nut, following FDA labeling), fish, and shellfish; we do not screen for sesame, soy, mustard, celery, or sulphites. If you have a food allergy, read the label on every product you use, and note that a kitchen can cross-contaminate in ways a recipe cannot control.

Ingredients

Serves 6
  • 6 cups ripe watermelon, coarsely grated or hand-crushed with its juice
  • 1 cup ripe mango, grated, or crushed pineapple
  • 1 1/2 cups
  • 1/4 cup sugar, or to taste
  • 1 cup cold water, if needed to loosen
  • a handful ice

Instructions

  • 1
    Grate or hand-crush the watermelon into a large bowl, keeping all the juice that runs off.
    ✎ Chef’s note
    The watermelon should be shredded, not blended smooth; the soft pulpy strands are what give 'otai its texture.
  • 2
    Grate in the mango or stir in the crushed pineapple.
  • 3
    Pour in the coconut milk and stir well, then sweeten with sugar to taste.
  • 4
    Loosen with a little cold water if it is too thick, then chill thoroughly.
  • 5
    Add ice and serve cold in cups or bowls, stirring before each pour.
Tongatapu tradition.

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🌏 While it simmers, know your destination

📍
Tongatapu. Tongatapu is the royal island, where the umu, an earth oven of hot stones, cooks lu parcels of taro leaf filled with coconut cream and meat or fish. Root crops, breadfruit, and reef fish anchor a Sunday table built around family and church.
🗺️
Tonga. The commonest lu is made with tinned corned beef, and that is worth saying plainly rather than hiding: imported tinned meat became part of Pacific cooking in the twentieth century and is now genuinely traditional. Taro leaves are wrapped around it with coconut cream and baked in the umu until the leaves collapse into something silky.
🌍
Oceania. The twentieth century changed the Pacific plate faster than anything before it. White rice, tinned corned beef, mutton flaps, flour and sugar arrived by ship and are now entirely everyday, and the public health consequences are among the most closely studied anywhere. Alongside that, Australian and New Zealand kitchens have taken up Asian technique and Maori and Pasifika cooking in a way they had not before.
The story behind this dish is up top, worth a read while the pot works.

More from Tonga

Lū PuluTaro-leaf parcels of seasoned beef and onion drowned in coconut cream, baked low until silken, Tonga’s Sunday centerpiece.
Keke IsiteTongan fried "yeast cakes", crisp-shelled, fluffy doughnuts eaten warm with tea, a Saturday-morning island tradition.
Faikakai TopaiSoft boiled dumplings drowned in a thick, dark coconut-sugar caramel, a Tongan after-feast sweet.
Browse all Tonga recipes →

Good to know

Storing it: Keep chilled and covered, and enjoy within 2 to 3 days.

Make it a Tonga meal

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Frequently asked questions

What is 'Otai?

A chilled Tongan cooler of hand-grated watermelon and tropical fruit loosened with sweet coconut milk.

Where does 'Otai come from?

'Otai is a Tongan dish from Tongatapu, Tonga.

Can 'Otai be made vegan, gluten-free, or dairy-free?

This 'Otai recipe includes substitution suggestions for vegetarian, vegan, gluten-free, dairy-free, egg-free, and pork-free versions. It cannot be made nut-free without changing what the dish is, so the recipe does not offer that version. Treat the substitutions as a starting guide rather than a guarantee, and see the allergen note below.

Is 'Otai safe for people with food allergies?

Our dietary labels and substitutions are a cooking guide, not medical or allergen-safety advice. We track dairy, egg, gluten, tree nuts and peanuts (we still count coconut as a tree nut to be cautious, although the FDA stopped listing it as one in 2025), fish, and shellfish, but we do not screen for sesame, soy, mustard, celery, or sulphites. If you have a food allergy, always read the label on every product you use, and remember a home or commercial kitchen can cross-contaminate ingredients in ways a recipe cannot control.

How long does 'Otai take to make?

About 20 minutes total (20 minutes prep, 0 minutes cooking), serving 6.

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