I have recently fell in gastronomical love with this fungus:

It is called Eringi in Japanese, or “King Oister Mushroom” in english — wikipedia tells me it is originally a mediterranean fungi, so I’m a bit surprised that the Japanese name is simpler. It is deadly simple to prepare – just slice it, fry it in a pan with a bit of oil, adding salt and black pepper, and it develops a rich taste not unlike that of white meat. Very little work, and I can get big chunks of it in the 24h 100 yen store near my apartment, which means that at least for a while it will successfully replace sweets (and maybe even ice cream?) as a midnight snack.