These patties are deliciously juicy without having to use mixed ground meat. (You can also make tasty patties with mixed ground meat in the same amounts).
They don't sell mixed ground meat in England. So I mixed in raw onions and tried making it with just ground beef. It was juicy and delicious.
This makes fairly large hamburger patties, so you can reduce the size if you'd prefer.Just be careful not to overcook them.English onions are pretty small, so you might need to use 2.
Enjoy Japanese food around the world.