A luxurious dish that you can make easily using just one frying pan! The key to the flavor is the tartness and richness of sour cream.
My husband loves this dish, and this is the version he likes the most.
Once you add the sour cream don't cook it anymore. It's easier if you dissolve the bouillon cube in hot water, then add cold water to bring it up to 400 ml.
Enjoy Japanese food around the world.