While in South Korea, my youngest son loved eating Gyudon, which is actually a popular Japanese dish.
It seemed easy enough to make at home, so I found a recipe online and worked with what I had or bought so I could make it for him.
I took 1 lb of shabu shabu beef, since it was already thinly sliced, and cut it into 2-3" pieces.
I mixed 1 cup dashi (I tried the Foodland Umami Dashi), 2 T sugar, 2 T water, 2 T mirin, and 6 T soy sauce.
I poured the sauce in the bottom of a pan, placed onion slices (1 large onion) on top, and then the beef on top of the onions.
I then covered it and cooked on medium heat until browned, skimming the fat with a strainer.
Once everything was cooked and mixed, I poured some sauce over hot rice, then added the meat and onions.
I topped with green onion curls and an onsen egg!
It was quick and easy, and turned out super delish!
You can find the original recipe here at Just One Cookbook.
