Sriracha Tuna and Gomasio Onigiri | Page 2

Prep Time

30 minutes

Cook Time

10 minutes

Total Time

40 minutes

Servings

4 servings (about 8 onigiri)

The gomasio crackling between your teeth against the still-warm rice — that’s what you’ll remember from this recipe. Homemade onigiri, stuffed with sriracha tuna, ready in less than 40 minutes. Japanese street food without the fuss.

Final result — Homemade sriracha tuna onigiri wrapped in their nori strip and sprinkled with gomasio — simple, effective, addictive.

Hold one in your palm. The rice is compact but not hard; it yields slightly under your fingers with that characteristic sticky texture of well-cooked rice. The almost black nori strip at the base crunches softly at the first bite. Inside, the filling is creamy — the mayonnaise binds everything together, while the sriracha arrives in a second wave with a frank, direct heat. And the gomasio on the surface, those small grains of toasted sesame mixed with salt, brings a roasted note that changes everything.

Why you’ll love this recipe

✓It can be prepared well in advance : Onigiri hold up for 2 to 3 hours at room temperature without getting soggy. You make them before your guests arrive, wrap them in cling film, and bring them out at happy hour. No one will know you finished an hour ago.

✓Zero special equipment : No onigiri mold, no sushi mat. Just your wet hands and a bowl of water within reach. The triangle forms in two or three motions once you get the hang of it.

✓Visual impact is out of proportion to the effort : Ten triangles neatly aligned on a wooden board, the sharp gomasio on the surface, and the straight nori strip — it makes an impression. The work-to-result ratio is hard to beat.

✓The filling is your playground : Sriracha tuna here, but the base works with flaked smoked salmon, lemon avocado mash, or herb cream cheese. The rice stays the same. The technique too.

Ingredient Notes

Everything needed for eight onigiri: jasmine rice, canned tuna, mayonnaise, sriracha, and organic gomasio.

Jasmine rice : This isn’t traditional sushi rice, which is round and even stickier, but it works very well here. Its slight floral fragrance disappears during cooking, and its hold is sufficient to form a triangle that doesn’t collapse. If you have sushi rice in stock, use that instead — the result will be even more compact.
Organic gomasio : A blend of toasted sesame and salt, originating from Japan. it’s a great alternative to plain salt on the surface and brings a much more interesting roasted note. You can easily find it in organic or Asian grocery stores. The organic version often has more fragrant sesame — it’s worth the detour.
Sriracha : One tablespoon in the filling is the right balance with the mayo: it adds a kick without dominating. Offer a small bowl on the side so everyone can dose it to their liking — not everyone likes the same level of spice.
Nori : Get sushi nori sheets, not the small snack sizes. Cut them into strips 3 to 4 cm wide. They soften quickly upon contact with damp rice — if you want to keep that characteristic crunch, wrap them truly at the last moment before serving.

Cook the rice without opening the lid, that’s the rule

450 g of jasmine rice in the pot, 600 ml of cold water, one teaspoon of salt. Bring to a boil, cover, lower the heat to minimum, and cook for ten minutes without lifting the lid. This trapped steam is what makes the rice fluffy and sticky — releasing it too early dries it out. Turn off the heat and let it rest for another five minutes covered. The rice should be pearly white, slightly translucent on the edges, and stick slightly to the wooden spoon when you stir it.

Prepare the filling while the rice rests

Drain the tuna seriously — press the lid against the can to extract as much liquid as possible, otherwise the filling will be too wet and the rice will get soggy from underneath. Mix with the mayonnaise and sriracha. The result should be creamy and homogeneous, with a soft orange tint. Taste it. If you feel the heat rising gradually but without burning, you’re exactly where you need to be.

Wet your hands between each onigiri — not just once

This is the step many forget. Dry hands make the rice stick everywhere except where it should. Dip your palms in a bowl of cold water, sprinkle a pinch of salt on them, then take about 75 to 80 grams of rice. Hot. Not lukewarm, not cold — hot. Create a hollow in the center with your thumb, place a generous spoonful of tuna filling, fold the rice over it, and press into a triangle. Three or four firm presses are enough. The triangle should hold itself up without cracking at the edges.

Only wrap the nori when ready to serve

Cut your nori sheets into strips 4 cm wide. Wrap a strip around the base of each onigiri, overlapping the ends — they stick naturally thanks to the rice’s moisture. The nori is still dry at this stage, almost crisp like thick paper, with that slightly marine briny smell. In less than ten minutes of contact with the rice, it will soften and become silky. If you want the crunchy effect in your mouth, serve right after wrapping. Sprinkle with gomasio last.

Tips & Tricks

Always work with hot rice — not boiling, but hot. When cold, the starch retracts and the rice loses its sticking power. Your triangles will fall apart at the first bite.
If making for a large crowd, keep the rice covered with a damp cloth while shaping the onigiri one by one. This prevents the surface from drying out and losing its texture.
Gomasio is always sprinkled last, after the nori. If applied too early, it becomes damp and loses that grainy, crunchy texture that makes it so interesting.

Close-up — The gomasio crunches on the sticky rice — a contrast of textures that makes all the difference.

FAQs

Can onigiri be prepared in advance?

Yes, up to 2 to 3 hours in advance. Wrap them individually in cling film or cover them with a damp cloth to prevent the rice from drying. Only wrap the nori at the last moment if you want to keep it crispy.

My rice isn’t sticky enough and the triangle collapses — what’s wrong?

In 90% of cases, the rice was too cold. Jasmine rice starch loses its stickiness as it cools — you must work with hot rice, removed from the heat less than 10 minutes ago. Also, make sure to press the triangle firmly between both palms.