A simple recipe for Komatsuna Onigiri that can be made by just mixing ingredients with cooked rice. This recipe generously uses budget-friendly komatsuna (Japanese mustard spinach), making it healthy yet flavorful with the savory notes of dashi powder and sesame oil. Crab sticks add color, making them perfect for bento boxes or for making ahead. Recommended when you want to easily incorporate vegetables into your diet.
Ingredients
Main Ingredients (5 rice balls)
- Komatsuna (Japanese mustard spinach) 1/2 bunch (100g)
- Crab sticks 4 sticks
- Cooked rice 1 go (approx. 350g)
Seasonings
- Salt 1 tsp
- [A] Dashi powder 1 tsp
- [A] Soy sauce 1 tsp
- [A] Sesame oil 1 tsp
- Salt (to taste)
Steps
- Make a cross-shaped cut at the base of the komatsuna and rinse off dirt with water. (This is the key!) The base often has soil, so wash it thoroughly.
- Prepare about 1L of boiling water in a pot, add 1 tsp of salt, and blanch the stems of the komatsuna for about 20 seconds.
- Add the leaves and blanch for about 20 seconds.
- Transfer the blanched komatsuna to cold water to cool, then squeeze out the water firmly by hand.
- From the squeezed komatsuna leaves, select 5 leaves that won't tear and spread them out to wrap around the onigiri. Place them on paper towels to drain excess water.
- Finely chop the remaining komatsuna into 5mm wide pieces. Squeeze out the water firmly by hand and place in a bowl.
- Shred the 4 crab sticks into four pieces each and add them to the same bowl.
- Add 1 tsp of dashi powder, 1 tsp of soy sauce, and 1 tsp of sesame oil to the bowl and mix well.
- Add the 1 go (approx. 350g) of cooked rice to the bowl and mix thoroughly with the other ingredients.
- If the flavor is too bland, adjust with salt.
- Divide the rice mixture into 5 portions, wrap each in plastic wrap, and shape them into balls.
- Wrap each rice ball with a komatsuna leaf and re-wrap in plastic wrap to shape. (This is the key!) You can also shape them into triangles and wrap the leaf around the bottom for a neat finish.






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