Tuna Mayo Onigiri

Tuna Mayo Onigiri

Hand-formed rice balls stuffed with a creamy, lightly seasoned tuna mayo filling and wrapped in a strip of crispy nori — Japan's most beloved lunchbox staple and the easiest portable meal you can make at home.

⏱ 25 minServes 4Japanese

Ingredients

  • 3 cups short-grain white rice, freshly cooked and warm
  • 170 g canned tuna in water, drained
  • 2 tbsp Japanese mayonnaise (Kewpie)
  • 1 tsp soy sauce
  • 1 tsp salt
  • 4 nori sheets, cut into wide strips
  • 1 tsp sesame seeds (optional)

Directions

  1. 1Mix drained tuna, Japanese mayonnaise, and soy sauce together in a bowl until combined.
  2. 2Wet your hands with cold water and sprinkle lightly with salt to season the rice as you work.
  3. 3Scoop about ½ cup of warm rice into one palm and press a small well in the center.
  4. 4Place 1–2 tablespoons of tuna filling into the well, then fold the rice up and over the filling.
  5. 5Shape the rice into a triangle by pressing firmly with both palms, rotating and pressing three sides until compact and holding together.
  6. 6Wrap the bottom of each onigiri with a strip of nori, sesame-seed side in if using.
  7. 7Serve immediately or wrap individually in plastic wrap for lunchboxes.

💡 Kewpie mayonnaise (sold at most Canadian grocery stores in the Asian section) has a richer, slightly tangier flavour than regular mayo — it makes a notable difference, but regular mayo works fine. Short-grain or sushi rice is essential; long-grain rice will not hold its shape.

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