If I could only eat one food for the rest of my life, this would be it. It is a Japanese dish, essentially onions and beef simmered in a sweet beef stock served over rice. The original Japanese recipe calls for dashi instead of beef stock. Dashi is a simple Japanese stock made from dried bonito flakes, a fish, and kelp. I find the beef stock version a bit more to my liking. Sake is a Japanese rice wine, available in any liquor store. Mirin is a sweet rice wine, Kikkoman makes an acceptable version called Aji-Mirin, available in most supermarkets.