Onigiri (Japanese rice balls) with soy-glazed salmon
Hand-formed onigiri filled with soy-glazed flaked salmon, toasted sesame and nori — perfect for lunchboxes or a picnic.
Onigiri are Japanese rice balls that are ridiculously portable and endlessly adaptable — the ideal lunchbox hero. This version fills warm, sticky rice with soy-glazed flaked salmon, wraps it in nori and finishes with toasted sesame for a little crunch.
They’re brilliant because the technique is simple: good rice, a little seasoning, and gentle shaping. Make a batch for picnics, work lunches or a quick snack — they keep well in the fridge for a day or two.
Ingredients
- 300 g Japanese short-grain rice
- 360 ml water — for cooking the rice
- 5 ml sea salt — plus extra for seasoning your hands when shaping
- 220 g salmon fillet — skin on or off, one fillet
- 15 ml light soy sauce
- 15 ml mirin
- 5 g caster sugar
- 5 ml vegetable oil
- 3 nori sheets — cut into strips to wrap each onigiri
- 15 g toasted sesame seeds
Equipment
- rice cooker or heavy-based saucepan
- kitchen scales
- sushi mould or small bowl (optional)
- clingfilm
Instructions
Measure 300 g Japanese short-grain rice into a sieve or bowl. Rinse under cold running water, stirring with your hand, until the water runs nearly clear (about 1–2 minutes). Drain well.
Put the rinsed rice into a heavy-based saucepan or rice cooker, add 360 ml water, cover and leave to soak for 30 minutes. This soaks the grains so they cook evenly.
If using a saucepan: bring to the boil over medium heat, then reduce to the lowest heat, cover and simmer for 12 minutes. Do not lift the lid while cooking. If using a rice cooker, follow the cooker instructions for white rice.
Turn off the heat and leave the rice, covered, to rest for 10 minutes. This final rest lets steam finish cooking the grains and gives the best texture.
While the rice soaks, mix 15 ml light soy sauce, 15 ml mirin and 5 g caster sugar in a small bowl. Heat a frying pan with 5 ml vegetable oil over medium heat.
Pat the salmon fillet dry. Fry skin-side down 3–4 minutes until the skin crisps, turn and cook 2–3 minutes until just cooked through. Pour the soy–mirin glaze into the pan for the last minute and spoon over the fish. Remove and flake with a fork.
Have a small bowl of cold water and a little extra sea salt to hand. Wet your hands, sprinkle a pinch of sea salt on one palm, take about 100 g warm rice and flatten it into a disc. Put 20–25 g flaked salmon in the middle, then fold and gently press into a triangle or ball. Repeat to make 4 onigiri.
Wrap the base of each onigiri with a strip of nori and sprinkle with toasted sesame seeds. Serve warm or at room temperature.
Tips
- Rinse until the water runs nearly clear — that removes excess starch and stops the rice becoming gluey.
- If you don’t have a rice cooker, use a heavy-based saucepan, a tight-fitting lid and the timings here. Keep the lid on during cooking and the 10-minute rest.
- To shape without sticking, keep a small bowl of cold water nearby and wet your hands before each onigiri; salt one palm to season the rice as you shape.
- Make ahead: shape the onigiri and wrap each in clingfilm; they keep in the fridge for up to 48 hours. Add nori just before eating so it stays crisp.
- Freeze: individually wrap cooled onigiri and freeze up to 1 month. Defrost overnight in the fridge and warm briefly in the microwave (if desired).
Substitutions
salmon fillet → tinned tuna mixed with a little mayonnaise and soy, same quantity of tuna by weight
Stays closelight soy sauce → tamari (gluten-free), same quantity
Stays closesalmon fillet → umeboshi (pickled plum), single plum per 4 onigiri placed in the centre
Noticeably different
Nutrition
Per serving · estimated
- 412
- Calories
- 16 g
- Protein
- 60 g
- Carbs
- 12 g
- Fat
- 2 g
- Fibre
- 2 g
- Sugar
- 550 mg
- Sodium
FAQ
Can I use leftover cooked rice to make onigiri?
Use leftover rice only if it was refrigerated quickly and is still moist. Warm slightly so it’s pliable — dry cold rice won’t bind well.
How tightly should I press the onigiri?
Press firmly enough that the rice holds shape but not so hard you mash the grains into paste. A gentle, even pressure is best.
How long will onigiri keep?
At room temperature eat within a few hours. Refrigerate up to 48 hours. For longer storage, freeze individually wrapped onigiri for up to 1 month.
Can I make onigiri vegetarian?
Yes — replace the salmon with fillings like umeboshi, pickled vegetables, or seasoned cooked mushrooms for a vegetarian option.
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