Mince the onion and chop the boiled egg.

Heat salted butter in a pan and sauté ground pork and minced onion over medium heat for about 3 minutes until the pork changes color.

Add cooking sake, salt, pepper, and dried parsley to the pan. Mix for 1 minute, then add the chopped boiled egg and mix. Let the mixture cool.

In a bowl, mix pancake mix, water, yogurt, and salad oil until smooth.

Divide the dough into 4 portions, cover with plastic wrap, and let rest at room temperature for 10 minutes.

Roll each portion of dough into a 10cm diameter circle using plastic wrap. Place the filling and pizza cheese in the center, fold the dough over, and seal the edges tightly.