Peel and chop the onion and saute in a little oil until transparent.
Meanwhile, peel the potatoes and boil until cooked through. Mash the potatoes well.
Mix in the onion and the chicken. Season well with salt and pepper.
Shape into 4 patties. Dust with flour and set aside.
While the cabbage (below) is cooking - heat another tblsp of oil in a frying pan and gently cook the patties until golden. Gently flip them over and do the other side. They will be quite fragile.
To Serve
Chop the white cabbage into shreds and saute in the oil until soft.
Add the soy sauce and cook until the soy sauce is just a coating on the cabbage.
Notes
This can be prepared up to 4 days in advance (undecorated) and stored, covered, in the fridge. Or it can even be frozen (undecorated)