Bento no. 11: Gyuudon (beef bowl) bento with konnyaku


Bento contents:

  • Gyuudon with konnyaku: Beef, onions and konnyaku on simmered in a sweet-savory sauce (220cal)
  • on 1 cup brown rice (220 cal)
  • Blanched greens (10 cal)
  • Pickled radish (5 cal)

Total calories (approx): 455 (how calories are calculated)

Time needed: 25 minutes total (15 the night before, 10 in the morning)

Type: Japanese

Gyuudon or beef bowl has become more and more popular outside of Japan. In its basic form, it’s beef and onions or leeks simmered in a savory-sweet sauce, served on a bed of rice. It can be awful if made with bad, gristly beef, but very good if made with good, tender slices.

This version of gyuudon cuts the calories and adds a lot of fiber by substituting some konnyaku for the beef. Konnyaku is made from glucommanon, the same as shirataki noodles. I’ve explained them both in detail on Just Hungry. They are both great sources of dietary fiber, and have practically no calories.

Shirataki noodles are actually used quite a bit in gyuudon recipes, but I’ve used konnyaku here because it has a more substantial, chewy texture. It has no flavor to speak of of its own, so it absorbs the flavors of anything it’s cooked in like a sponge.

The top trick used here is setting aside some ingredients for a dinner dish to make the main part of this bento simultaneously. I made this gyuudon mixture at the same time I made hayashi rice or Japanese beef stew a couple of nights before. Two of the main ingredients, beef and onions, are the same after all. So I sauteed the onions for both, then made the gyuudon on the side in a separate pan. So why not just use leftover hayashi rice for the bento? Well, you can of course. (Actually I did have a hayashi rice leftover bento once this week too.) This way you can have totally different tasting bentos using almost the same ingredients!

The greens can be anything you like - spinach, pak choy, etc. I used some of the last leaves on our Swiss chard plants in the garden.

The little pink things you see in the photo are whole pickled radishes - I just put some radishes in a vinegar-sugar-salt marinade for a few days in the fridge. Any pickles will do here - they are there mainly for color and texture contrast.


For the beef mixture:

This makes enough for 2 portions.

  • 120g / about 4 oz thinly sliced beef
  • 1/2 block of konnyaku (about 175g)
  • 1 large onion
  • 1 small piece of fresh ginger
  • 2 Tbs. soy sauce
  • 1 Tbs. mirin
  • 2 tsp. sugar
  • 1 cup water
  • 1 Tbs. sesame oil
  • A handful of green onions for color (optional)

  • A small bunch of greens of your choice - spinach, pak choy, chard, etc.

  • pickles of your choice


  • 1 large nonstick frying pan or sauté pan
  • 1 saucepan
  • electic water kettle

Steps - up to a couple of nights before

  • Heat up some water in the electric kettle.
  • Cut open the konnyaku and drain out the water; put in pan.
  • Slice the onion thinly. Chop up the fresh ginger.
  • Heat up the frying pan, and add the sesame oil. Sauté the onion and garlic until the onion is limp.
  • In the meantime, boil the konnyaku for a few minutes. Drain, cut in half and slice thinly. (Use the other half in soup or something else.)
  • Add the konnyaku to the pan. Add the beef, and saute until browned.
  • Add the seasonings and water. Simmer until the liquid is almost gone.
  • Let cool and store in the refrigerator.

Steps - in the morning

  • Fill and switch on the kettle.
  • Wash the greens.
  • Defrost the rice in the microwave until warmed through.
  • Heat up a large frying pan; add the beef mix, Heat through over medium-low heat.
  • Boil the greens in boiling water for a couple of minutes. Drain, cool under cold running water, and sqeeze out. Cut into bite sized pieces.
  • Fill the bento box with rice on the bottom.
  • Pile the beef mix on top. Let cool to room temperature.
  • Add the greens and the pickles. Sprinkle a little nanami (or shichimi) tohgarashi (7-flavor red pepper powder) on top.


It’s important the heat the beef mixture through in the morning, especially if it’s been in the fridge longer than overnight.


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What a beautiful and

What a beautiful and informative site! I love those chickpea fritters on your previous post :)

thank you!

I’m glad you like the site Maryann :) Thanks for visiting!

Did I predict this or what?!

Did I predict this or what?! ;) Gyudon is sooooo delicious. Is there some trick to cooking it without cooking out the fat? I know for healthy eating it’s actually better to cook it out, but commercially it comes cooked but still nicely marbled, which I think pleasantly adds nicely to the flavor.

Now this is my kind of

Now this is my kind of bento. :0) Look at all that meat… yum!

Looks like a lot

It looks like a lot of beef, and eats like it too, but it has less beef than your typical fastfood hamburger..that’s the great thing about sneaking in some konnyaku!


I used to be skeptical about konnyaku (mainly because in here the only available type is the white one) because it’s white and it’s tasteless but now after I tried this recipe I become a huge fan of konnyaku! However I prever to cut the konnyaku into smaller pieces :) thanks a lot, Maki!

Re: Bento no. 11: Gyuudon (beef bowl) bento with konnyaku

Do you think I can use any other meat besides beef? (I'm Hindu so I can't eat beef) :)

Re: Bento no. 11: Gyuudon (beef bowl) bento with konnyaku

You say to saute the onion & garlic, but garlic isn't listed in the ingredients?

Re: Bento no. 11: Gyuudon (beef bowl) bento with konnyaku

What cut of beef would you use?

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