Omelet Stuffed with Tomatoey Chicken Rice

This is one of the classic Japanese yoshoku dishes, very quick to make and exceptionally tasty. Some places in Tokyo serve nothing but this dish and offer different rice-based fillings and toppings, such as curry sauce or Hayashi beef sauce spooned over the top.

The omelet should still be soft in the middle when the filling is added, and then it should be carefully flipped over the filling, so that e