Gyudon

This is one of the easiest meals you can make.

Ingredients
1 large white onion cut in wedges
1 cup light chicken stock
3 Tbsp sugar
½ cup sake
½ cup mirin
½ cup soy sauce
3cm piece of ginger grated
500 gm fillet steak very thinly sliced – beef, lamb or pork

To serve
Steamed rice
Wilted spinach
Shredded spring onion and sliced chili

Method
Place the onions and stock in a pan. Bring to the boil then reduce to a simmer for 5 mins until onions are slightly softened.
Stir in the sugar, sake, mirin, soy and ginger and simmer for 3 mins. Drop in the sliced meat and simmer for 1 min until just cooked. Set aside for 1 min.
Place rice into 4 serving bowls. Top with wilted spinach and some of the beef and onions. Then ladle over some of the hot broth. Scatter with spring onions and chili. Top with other ingredients such as tofu, egg, mushroom.
Serves 4

Chook's note: You need to slice the meat very finely. If you have an Asian supermarket nearby, you’re bound to find thin sliced beef, pork or lamb pre-packed.  
I find this can be very sweet so suggest cutting way back on the sugar.  You might also want to dilute the stock a little to taste so try easing off on the sake, mirin, and soy sauce or add more water.
You can incorporate lots of additional ingredients like mushrooms, poached egg, tofu, but it is quite delish as is.