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Easy Spicy Tuna Sushi Bento Box Recipe

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A quick and easy homemade spicy tuna sushi bento box featuring creamy, spicy tuna and perfectly seasoned sushi rice, ideal for lunch or dinner.

Ingredients

Scale
  • 8 ounces sushi-grade tuna, finely diced
  • 1 cup sushi rice (short-grain Japanese rice)
  • 3 tablespoons rice vinegar
  • 1 tablespoon sugar
  • 1 teaspoon salt
  • 3 tablespoons Japanese mayonnaise (e.g., Kewpie)
  • 1 to 2 teaspoons sriracha sauce
  • Soy sauce, for dipping and seasoning
  • 4 full nori sheets, toasted
  • ½ medium cucumber, julienned
  • 1 stalk green onion, thinly sliced (optional)
  • 1 tablespoon toasted sesame seeds
  • Pickled ginger and wasabi, for serving (optional)

Instructions

  1. Rinse 1 cup sushi rice under cold water until the water runs clear. Cook in a rice cooker or on the stovetop with 1 ¼ cups water, about 18 minutes. Let it rest covered for 10 minutes.
  2. In a small bowl, mix 3 tablespoons rice vinegar, 1 tablespoon sugar, and 1 teaspoon salt until dissolved. Gently fold this mixture into the warm rice using a wooden spoon or rice paddle. Let cool to room temperature (about 20 minutes).
  3. In a bowl, combine 8 oz finely diced sushi-grade tuna, 3 tablespoons Japanese mayonnaise, and 1 to 2 teaspoons sriracha. Adjust heat to your liking. Mix gently to coat evenly without mashing the tuna.
  4. Place a sheet of nori on the bamboo mat covered with plastic wrap. Spread a thin, even layer of sushi rice (about ½ cup) over the nori, leaving a 1-inch border at the top. Wet your fingers to prevent sticking.
  5. Arrange a line of spicy tuna and julienned cucumber along the bottom edge of the rice.
  6. Using the bamboo mat, roll the sushi tightly away from you, applying gentle pressure. Seal the edge by wetting the bare nori strip.
  7. With a wet, sharp knife, cut the roll into 6-8 equal pieces. Clean the knife between cuts to keep slices neat.
  8. Arrange sushi rolls, pickled ginger, wasabi, and a small side of soy sauce in your bento box. Garnish with toasted sesame seeds and green onion slices.

Notes

Keep your hands wet to prevent rice from sticking. Use a sharp knife and wipe it clean between cuts for neat slices. Let the rice cool to room temperature before rolling. Adjust sriracha to control spice level. Fresh sushi-grade tuna is recommended for best flavor and safety.

Nutrition

Keywords: spicy tuna sushi, sushi bento box, homemade sushi, easy sushi recipe, Japanese cuisine, sushi rolls, spicy mayo tuna

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