It tastes just like what they serve at "family restaurants" (rather like diners) in Japan. You can use your favorite mushrooms instead of enoki mushrooms...
I made these for my daughter who loves Japanese-style hamburgers. She said, "These are just like the ones you can get at a family restaurant so that's where I got the name lol.
Finely mince the onions. Make sure to knead the meat mixture thoroughly.
Enjoy Japanese food around the world.