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Spicy Tuna Rice Squares Recipe

When it comes to bite-sized appetizers or satisfying snacks, few things are as delightful as a well-prepared Spicy Tuna Rice Squares recipe. With a crispy rice base topped with a creamy, spicy tuna mixture, these little squares are a crowd-pleaser at gatherings, a restaurant-style treat at home, and a perfect indulgence for sushi lovers.

As a professional chef with years of experience crafting delicious, approachable recipes, I’m here to guide you through creating the ultimate Spicy Tuna Rice Squares from scratch. In this post, we’ll dive deep into everything you need to know—from selecting the best ingredients to mastering texture, flavor balance, and even creative variations to suit your taste.

Let’s dive into this irresistible adventure!

Why You’ll Love This Spicy Tuna Rice Squares Recipe

  • Restaurant-Quality at Home: Recreate your favorite sushi bar experience.
  • Flavor Bombs: The combination of crispy rice, spicy tuna, and creamy toppings is unbeatable.
  • Customizable Heat Levels: Adjust the spiciness to match your personal preference.
  • Perfect for Any Occasion: These squares shine as appetizers, snacks, or even a fancy lunch.
  • Fun and Interactive: This recipe is a joy to prepare, and even more fun to eat.

Ingredients for Spicy Tuna Rice Squares Recipe

Getting your ingredients right is crucial for achieving authentic flavor and texture. Here’s what you’ll need:

For the Sushi Rice Base:

  • 1 ½ cups sushi rice (short-grain Japanese rice)
  • 2 cups water
  • 3 tablespoons rice vinegar
  • 1 tablespoon sugar
  • 1 teaspoon salt
  • 2 tablespoons neutral oil (for frying, such as canola or vegetable oil)

For the Spicy Tuna Topping:

  • 8 ounces sashimi-grade ahi tuna, finely diced
  • 2 tablespoons mayonnaise (preferably Japanese Kewpie mayo)
  • 1 tablespoon Sriracha sauce (adjust to taste)
  • 1 teaspoon sesame oil
  • 1 tablespoon finely chopped green onions
  • ½ teaspoon soy sauce
  • ½ teaspoon lime juice
  • 1 teaspoon toasted sesame seeds (optional)

Garnishes and Extras:

  • Sliced avocado (optional but recommended)
  • Thinly sliced jalapeños (for extra heat)
  • Extra Sriracha or spicy mayo drizzle
  • Microgreens or chives for a fresh finish

Pro Tip: Using sashimi-grade tuna is non-negotiable for this recipe, both for safety and flavor. Always source from a trusted fishmonger.

Equipment You’ll Need

  • Sharp chef’s knife
  • Rice paddle or wooden spoon
  • Small baking pan (8×8 inch works perfectly)
  • Plastic wrap
  • Frying pan (preferably non-stick)
  • Tongs or slotted spatula
  • Mixing bowls

How to Make Spicy Tuna Rice Squares

Now, let’s get to the good part—the cooking! Here’s a step-by-step breakdown:

1. Prepare the Sushi Rice

Rinse the rice: Place the sushi rice in a fine-mesh strainer and rinse under cold water until the water runs clear. This removes excess starch and ensures the rice won’t be gummy.

Cook the rice: Combine rinsed rice and 2 cups of water in a saucepan. Bring to a boil, then cover and reduce heat to a simmer for 15 minutes. Remove from heat and let it steam, covered, for another 10 minutes.

Season the rice: While the rice is hot, gently fold in the rice vinegar, sugar, and salt mixture using a rice paddle or wooden spoon. Be careful not to mash the rice—use slicing and lifting motions.

Chef’s Tip: Let the seasoned rice cool to room temperature before shaping, but don’t refrigerate—it dries out the grains.

2. Shape and Chill the Rice

Line a pan: Line an 8×8-inch pan with plastic wrap, leaving overhang on the sides.

Press the rice: Spread the cooled rice evenly in the pan, pressing down firmly to compact it into a dense, uniform layer about ½ to ¾ inch thick.

Chill: Refrigerate for at least 1 hour. Chilling firms up the rice, making it easier to cut and fry.

3. Prepare the Spicy Tuna Mixture

While the rice chills, prep the star topping:

  • In a bowl, mix diced tuna, Kewpie mayo, Sriracha, sesame oil, soy sauce, lime juice, and green onions.
  • Gently fold everything together until combined.
  • Taste and adjust seasoning—add more Sriracha for heat or lime for brightness.
  • Cover and refrigerate until ready to use.

4. Cut and Fry the Rice Squares

Cut into squares: Remove the chilled rice from the pan using the plastic wrap. Place it on a cutting board and cut into 16 even squares (4×4 grid).

Fry the rice: Heat 2 tablespoons of neutral oil in a non-stick skillet over medium-high heat. Working in batches, fry the rice squares for 2-3 minutes per side until golden brown and crispy.

Drain: Transfer fried squares onto a paper towel-lined plate to drain excess oil.

5. Assemble the Spicy Tuna Rice Squares

Top each crispy rice square with a generous spoonful of the spicy tuna mixture.

Garnish creatively:

  • A slice of avocado adds buttery richness.
  • A thin jalapeño slice brings extra spice.
  • A sprinkle of sesame seeds and some microgreens give a beautiful, professional finish.

Expert Tips for Perfect Spicy Tuna Rice Squares

  • Knife Care: Wet your knife before slicing the chilled rice—it prevents sticking.
  • Temperature Control: Keep your frying oil at a steady medium-high; too hot and the rice will burn before crisping, too cool and it’ll be greasy.
  • Texture is Key: The rice should be firm and crispy outside but tender inside. Don’t over-fry.
  • Freshness Matters: Always prepare and consume spicy tuna topping fresh to maintain its delicate flavor.

Variations on the Spicy Tuna Rice Squares Recipe

Want to make it your own? Try these tasty spins:

1. Spicy Salmon Rice Squares

Substitute diced sashimi-grade salmon for the tuna. It offers a slightly richer flavor and pairs beautifully with the same spicy mayo mixture.

2. Vegetarian Crispy Rice Squares

Top the crispy rice with a spicy avocado mash or a seasoned tofu tartare for a plant-based version that’s equally satisfying.

3. Mango-Tuna Twist

Mix diced mango into the spicy tuna for a sweet and spicy flavor burst that’s perfect for summer gatherings.

4. Extra-Crunchy Version

After frying, sprinkle panko breadcrumbs on top for an even crunchier bite!

How to Serve Spicy Tuna Rice Squares

These spicy tuna rice squares are highly versatile when it comes to serving:

  • As an appetizer at cocktail parties or dinner gatherings.
  • As a light meal paired with a side of miso soup and seaweed salad.
  • For sushi nights alongside rolls and sashimi for variety.
  • For date nights as a special homemade treat.

You can plate them beautifully on a platter with lemon wedges, extra spicy mayo drizzle, and edible flowers for a restaurant-quality presentation!

Storage and Make-Ahead Tips

Storage:

  • The crispy rice squares can be made ahead and stored (un-topped) in an airtight container for up to 2 days. Reheat briefly in a hot skillet or oven to refresh the crispness.
  • The spicy tuna mixture should always be made fresh. If necessary, it can be kept refrigerated for a maximum of 4 hours before serving.

Make-Ahead:

  • Prep the seasoned rice and spicy tuna separately a few hours before guests arrive.
  • Fry the rice squares right before assembly for the best texture.

Final Thoughts on This Spicy Tuna Rice Squares Recipe

This Spicy Tuna Rice Squares recipe is everything you want in a bite: crunchy, creamy, spicy, and downright delicious. It’s the kind of dish that sparks conversation and disappears from the platter in seconds.

Mastering this recipe at home not only brings sushi-bar sophistication to your kitchen, but it also empowers you to get creative with flavors and presentation.

Whether you’re hosting friends, treating yourself to a gourmet snack, or impressing someone special, these spicy tuna rice squares will never let you down.

Spicy Tuna Rice Squares Recipe

Create restaurant-quality appetizers at home with this easy and flavorful Spicy Tuna Rice Squares Recipe featuring crispy rice topped with creamy, spicy tuna. Perfect for sushi lovers and party platters!
Prep Time 1 hour 15 minutes
Cook Time 15 minutes
Course Appetizer, Snack
Cuisine Japanese
Servings 16 squares
Calories 120 kcal

Ingredients
  

For the Rice:

  • 1 ½ cups sushi rice
  • 2 cups water
  • 3 tablespoons rice vinegar
  • 1 tablespoon sugar
  • 1 teaspoon salt
  • 2 tablespoons neutral oil canola or vegetable oil

For the Spicy Tuna Topping:

  • 8 ounces sashimi-grade ahi tuna finely diced
  • 2 tablespoons Kewpie mayonnaise
  • 1 tablespoon Sriracha sauce adjust to taste
  • 1 teaspoon sesame oil
  • 1 tablespoon green onions finely chopped
  • ½ teaspoon soy sauce
  • ½ teaspoon lime juice
  • 1 teaspoon toasted sesame seeds optional

Garnishes (Optional):

  • Sliced avocado
  • Thinly sliced jalapeños
  • Extra spicy mayo drizzle
  • Microgreens or chives

Instructions
 

Step 1: Prepare the Sushi Rice

  • Rinse the sushi rice under cold water until water runs clear.
  • Cook rice with 2 cups of water: bring to a boil, then simmer covered for 15 minutes.
  • Remove from heat and let steam covered for another 10 minutes.
  • While warm, gently fold in rice vinegar, sugar, and salt.

Step 2: Shape and Chill the Rice

  • Line an 8×8-inch pan with plastic wrap.
  • Press the seasoned rice into an even ½ to ¾-inch thick layer.
  • Chill in the refrigerator for at least 1 hour until firm.

Step 3: Make the Spicy Tuna Topping

  • In a bowl, combine diced tuna, Kewpie mayo, Sriracha, sesame oil, soy sauce, lime juice, and green onions.
  • Mix gently and refrigerate until needed.

Step 4: Cut and Fry the Rice Squares

  • Remove the rice from the pan and cut into 16 squares.
  • Heat oil in a non-stick pan over medium-high heat.
  • Fry rice squares in batches for 2-3 minutes per side until golden brown.
  • Drain on paper towels.

Step 5: Assemble

  • Top each crispy rice square with a spoonful of spicy tuna.
  • Garnish with avocado slices, jalapeños, microgreens, and a drizzle of spicy mayo if desired.

Notes

  • Rice Tip: Wet your knife before slicing the chilled rice to prevent sticking.
  • Tuna Safety: Always use sashimi-grade tuna and consume the spicy tuna topping fresh.
  • Make-Ahead: You can prepare the rice a day in advance and fry just before serving.
  • Storage: Store leftover fried rice squares separately and reheat in a skillet; spicy tuna topping should not be stored for more than 4 hours.
  • Variations: Swap tuna with sashimi-grade salmon, or make a vegetarian version using spicy avocado mash.