Have you ever tried 'Gyu Don (or Sukiyaki Don) ?
'Sukiyaki' is a one of the traditional dish in Japan (below picture) and using 'Gyu = Beef' , leek (Poireau) and Tofu as basic.
'Don' means rice-bowl dish which you can put kind of whatever on top of the rice.
so, if you put 'Sashimi' on top of the rice .... become 'Sashimi Don'
put 'Pork ginger wok' .... become 'Pork ginger Don', etc.
Let's Make Gyu-Don
Where you can get the thin meat is in Ixelles meat shop or Chinese super market is below....... and Onion!
*** if you cannot find a Mirin, never mind! you can replace to sugar.
if no Sake? never mind! you can replace to white dry wine.