• Prepare the rice

The meat, tonkatsu

• Make a few small cuts where the meat meets the fat to prevent the meat from folding when frying. 
• In a bowl, add the egg and beat it. Add some flour in a plate and some panko on the other.
• Coat the meat with flour. Dip it on the egg and finally coat it on panko. Make sure to press lightly so the panko adheres well to the meat. 
•  In a frying pan or wok, add the oil and heat it up up to 170 ºC. Add the meat and cook for a couple of minutes for each side.
• Remove from the oil and let it rest on a rack. 

Sauce

• Cut the onions into same size pieces.
• in a frying pan add the dashi, the mirin, the sake, the soy sauce, the sugar and the onion.
• Cook the sauce at medium-high heat until the onion is cooked.
• Cut the meat (tonkatsu) into bite size pieces. 
• Add an egg in a bowl and beat it lightly.
• When the onion is ready and the sauce has reduced add the meat add the egg, cover and leave to cook until the egg is 80% cooked
• Add the rice to a bowl and as soon as the egg is ready, top it.
• Enjoy this delicious katsudon!