Name: Onigirazu – Japanese Sushi Rice Sandwich with Fresh Vegetables and Spicy Mayo Recipe
Prep time: 15 min
Cook time: 15 min
Total time: 50 min
Cuisine: Japanese
Ingredients: 13.75 oz (390 g) sushi rice; 18.5 oz (525 g) water; 4 nori seaweed sheets; 2 large carrots; 2 medium avocados; 4 mini cucumbers; 1 medium red onion; Fresh cilantro (to taste); Arugula (to taste); Mayonnaise (to taste); Sriracha sauce (to taste); Black sesame seeds (to garnish); Soy sauce (for serving); Satay sauce (peanut and coconut, optional for serving); Hoisin sauce (optional for serving)

If you’ve been searching for a bright, fun, and totally satisfying meal, you’ve got to try the Onigirazu – Japanese Sushi Rice Sandwich with Fresh Vegetables and Spicy Mayo Recipe. This delightful twist on traditional sushi brings together fluffy sushi rice, fresh, crunchy vegetables, and a creamy, spicy mayo all wrapped in crisp nori seaweed. It’s a feast for the eyes and the palate, perfect for lunch, picnics, or anytime you crave something vibrant and nourishing without the fuss of rolling sushi by hand. Trust me, once you master this, it becomes a go-to recipe for sharing with friends or enjoying a flavorful bite on the go!

Ingredients You’ll Need

The image shows a white bowl filled with fluffy white rice placed on a white marbled surface. To the right of the bowl, there are two halves of a ripe avocado with green flesh and brown seeds, and a whole dark green avocado nearby. A large square sheet of dark seaweed is positioned behind the bowl and avocados. Around these main items, there are fresh green herbs, small green cucumbers, two orange carrots, and a reddish-purple onion. The colors are vibrant with strong contrasts between the dark green seaweed, bright green vegetables, and white rice. photo taken with an iphone --ar 4:5 --v 7

The charm of this dish lies in its simplicity and fresh ingredients, each playing a crucial role in balancing taste, texture, and color. From the sticky sushi rice that acts as a comforting base to the crisp carrots and creamy avocado, every component is essential for that perfect Onigirazu experience.

Sushi rice (13.75 oz / 390 g): The foundation of your sandwich, its stickiness holds everything together beautifully.
Water (18.5 oz / 525 g): For cooking the rice perfectly fluffy and tender.
Nori seaweed sheets (4 sheets): These provide a slightly salty crunch and a classic sushi touch.
Carrots (2 large): Thinly sliced for a sweet, crunchy texture and vibrant color.
Avocados (2 medium): Creamy slices that add richness and balance the spice.
Mini cucumbers (4): Crisp and refreshing, slicing them thin adds a light crunch.
Red onion (1 medium): Thin julienne slices bring a slight sharpness that wakes up the palate.
Fresh cilantro: Bright, herbaceous notes that elevate the sandwich’s freshness.
Arugula: A peppery green for an extra layer of flavor and bite.
Mayonnaise: Creamy base for the spicy mayo, mellow and smooth.
Sriracha sauce: Adds the perfect kick of spice to the mayo.
Black sesame seeds: Garnish that adds a nutty flavor and pretty contrast.
Soy sauce: Optional but great for dipping, enriching umami flavors.
Satay sauce (peanut and coconut): For a creamy, slightly exotic twist if you want to experiment.
Hoisin sauce: Adds a sweet and tangy depth if you feel adventurous.

TIP

You’ll find the full ingredient list, instructions, and print option in the recipe card below.

How to Make Onigirazu – Japanese Sushi Rice Sandwich with Fresh Vegetables and Spicy Mayo Recipe

Step 1: Prepare the Sushi Rice

Start by washing your sushi rice thoroughly to get rid of excess starch. Placing it in a strainer, rinse under cold water while gently moving the grains with your hands. Keep rinsing until the water runs clear – this step is crucial to achieving that perfect sticky but fluffy texture that holds the sandwich together without getting mushy.

Step 2: Soak and Cook the Rice

Leave the rinsed rice in the strainer with a bowl underneath to catch excess water and let it rest for 30 minutes. Then transfer the rice to a large pot, add the measured water, and cook over medium heat. Once boiling, reduce the heat to low, cover the pot, and let your rice cook gently for 13 minutes without lifting the lid. After removing from heat, allow it to rest covered for 10 minutes. This resting time lets the rice steam perfectly and absorb all moisture.

Step 3: Prepare the Fresh Vegetables

While the rice rests, get your fresh veggies ready. Peel the carrots and use a mandolin to slice them into fine, thin strips. Julienne the red onion finely, slice the cucumbers into thin rounds, and carefully slice the avocado lengthwise into thin slices. These fresh, crisp vegetables will provide the delightful crunch and creaminess that make the Onigirazu so enjoyable.

Step 4: Assemble Your Onigirazu

On a clean work surface, lay down a square piece of plastic wrap. Place one sheet of nori on top with the shiny side facing down. Spread a little mayonnaise mixed with a pinch of Sriracha sauce over the nori – this spicy mayo layer is where that beautiful flavor boost begins. Then, place a square layer of sushi rice over the mayo, pressing gently but thoroughly.

Step 5: Layer the Fillings and Wrap

Add the fresh vegetables and some fresh cilantro and arugula on top of your rice. You can drizzle a bit of satay or hoisin sauce here for an exciting flavor twist if you love a little extra complexity. Fold the corners of the nori over the filling like a parcel, wrapping it snugly in the plastic wrap to hold everything tight. Gently flatten the package, then let it rest for 10 to 12 minutes. This resting period softens the seaweed, melding the flavors together wonderfully.

Step 6: Slice and Serve

Finally, slice the Onigirazu in half with a sharp knife, ideally keeping it wrapped to maintain structure. Cut in the same direction as your carrots to keep everything neat and pretty. Unwrap just before eating to enjoy that gorgeous fusion of textures and flavors!

How to Serve Onigirazu – Japanese Sushi Rice Sandwich with Fresh Vegetables and Spicy Mayo Recipe

The image shows four thick slices of sushi roll placed on crumpled brown paper over a white marbled surface. Each sushi slice has a dark outer seaweed layer wrapped tightly around a thick layer of white sticky rice. Inside, from left to right, there is a layer of thin, bright green cucumber strips, followed by orange carrot sticks arranged in a row, then dark green leafy vegetables, and small pieces of light purple pickled vegetables. The colors of each layer are vivid and the textures of fresh vegetables and sticky rice are clear. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Sprinkle black sesame seeds over the sliced sandwiches for a subtle nutty crunch and a pop of contrast against the creamy avocado and white rice. A light drizzle of soy sauce or an extra touch of spicy mayo on the side elevates each bite perfectly.

Side Dishes

This Onigirazu pairs beautifully with crisp pickled ginger, a bowl of miso soup, or a simple seaweed salad. The fresh sides balance the sandwich’s richness and add authentic Japanese flavors to your meal experience.

Creative Ways to Present

For a fun twist, try cutting your Onigirazu into bite-sized cubes for party platters or bento boxes. You can also experiment with different fillings like smoked salmon, grilled chicken, or even tofu to make it your own signature version of this Japanese sushi rice sandwich with fresh vegetables and spicy mayo recipe!

Make Ahead and Storage

Storing Leftovers

Wrap any leftover Onigirazu tightly in plastic wrap and place it in the fridge. It’s best enjoyed within 24 hours for optimal freshness and texture since the nori can start to soften too much and lose its pleasant chew.

Freezing

Freezing Onigirazu is generally not recommended because the texture of the rice and fresh vegetables can deteriorate, becoming soggy and losing their crispness when thawed.

Reheating

If you want to reheat, unwrap and either enjoy cold or warm gently in the microwave for a few seconds, but be cautious as the fresh ingredients might lose their fresh crunch and the nori could get tough.

FAQs

Can I use regular rice instead of sushi rice?

Sushi rice is sticky and slightly sweet, making it ideal for Onigirazu because it holds the sandwich together. Regular rice might not stick as well, causing your sandwich to fall apart.

What if I don’t like spicy food?

You can easily adjust the heat by reducing or omitting the Sriracha in the mayo. It still tastes delicious and creamy without the spice!

Can Onigirazu be made vegetarian or vegan?

Absolutely! This recipe is naturally vegetarian. For a vegan version, simply use vegan mayonnaise and ensure any additional sauces are plant-based.

How do I keep the nori from getting soggy?

Wrapping the Onigirazu tightly in plastic wrap and letting it rest helps the nori hydrate correctly without becoming soggy. Also, enjoy it within a day for the best texture.

Can I add protein to this Onigirazu?

Yes! Adding grilled chicken, smoked salmon, tofu, or even cooked shrimp is a great way to boost the protein and make it a fuller meal.

Final Thoughts

There is something incredibly satisfying about making and sharing the Onigirazu – Japanese Sushi Rice Sandwich with Fresh Vegetables and Spicy Mayo Recipe. It’s fresh, flavorful, and hands-on fun that anyone can master in their kitchen. Whether you’re packing lunch for work, an on-the-go snack, or a casual dinner, this recipe will bring joy and plenty of smiles around your table. Give it a try and watch it become a beloved staple in your recipe collection!