A recipe for Korokke from the cookbook, Delicious Japanese Street Eats! These Japanese croquettes are filled with a potato and meat mixture, then fried until crisp and golden.
Add the ground beef, season with salt and cook over high heat for 4 to 5 minutes.
Incorporate the mixture into the mashed potatoes and mix well. Remove from heat and stir in the egg yolks while mixing. Season again with salt and pepper.
Shape the mixture into 6 balls (I formed mine more into an oval shape).
Beat the egg whites in a bowl.
Place the potato starch on one plate and the panko breadcrumbs on another.
Coat each ball in potato starch, then the beaten egg whites and finally in the panko breadcrumbs.
Heat the oil in a wok and fry the croquettes for about 5 minutes, until they're golden brown.
Drain the croquettes on paper towels and serve them with tonkatsu sauce.