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Spicy Tuna Onigiri

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Spicy Tuna Onigiri is a modern twist on traditional Japanese rice balls, featuring sushi rice filled with a creamy, spicy tuna mixture and wrapped in crisp nori. A flavorful, portable snack or light meal that’s both satisfying and easy to prepare at home.

  • Total Time: 50 minutes
  • Yield: 5-6 onigiri

Ingredients

1½ cups Japanese short-grain rice (sushi rice)

15 fl oz (440 mL) cold water

Kosher salt

1 (4.5 oz) can Albacore tuna in extra virgin olive oil, drained

1½ tbsp mayonnaise

1 tsp sriracha hot sauce

½ tsp rice vinegar

1 scallion, green parts only, finely sliced

Toasted black sesame seeds (optional)

3 sheets toasted nori, cut in half crosswise

Instructions

  1. Rinse the sushi rice thoroughly in a sieve under cold water until water runs clear. Drain well.
  2. Cook rice in a rice cooker with 15 fl oz water or bring to a boil in a saucepan, then reduce to low, cover, and cook 16–18 minutes. Let stand, covered with a towel and lid, for 10 minutes after cooking.
  3. In a bowl, mix drained tuna, mayonnaise, sriracha, and rice vinegar. Stir in scallions.
  4. Prepare a bowl of room temp water and a bowl of kosher salt. Moisten hands with water and rub with salt.
  5. Take about ½ cup of rice and form into a thick oblong shape. Place 1 tbsp of tuna filling in the center and cover with rice, adding more if needed.
  6. Shape into a triangle using palms and fingers, rotating as needed. Avoid compressing too tightly.
  7. Sprinkle with sesame seeds (optional), wrap with a piece of nori, and top with extra tuna filling if desired.
  8. Serve immediately for best texture.

Notes

  • Use plain rice vinegar, not seasoned.
  • Kewpie mayo adds creaminess if preferred over regular mayo.
  • Do not over-compress rice when shaping to maintain soft texture.
  • Can prep rice and filling separately and assemble fresh before eating.
  • Author: Monica
  • Prep Time: 20 minutes
  • Cook Time: 30 minutes
  • Category: Snack
  • Method: Hand-Shaped
  • Cuisine: Japanese
  • Diet: Low Lactose

Nutrition

  • Serving Size: 1 serving
  • Calories: 250
  • Sugar: 1g
  • Sodium: 150mg
  • Fat: 4g
  • Saturated Fat: 0.5g
  • Unsaturated Fat: 3.5g
  • Trans Fat: 0g
  • Carbohydrates: 41g
  • Fiber: 2g
  • Protein: 10g
  • Cholesterol: 10mg