Quick Ham and Cheese Hand Pies

Pour the room-temperature kefir into a bowl, add the salt, sugar, and vegetable oil, and whisk until smooth.

Sift the flour and baking powder in gradually, kneading until you have a smooth, elastic dough that doesn't stick to your hands.

Shape the dough into a ball, place it in a bag, and let it rest for 20 to 30 minutes.

Dice the ham and cheese finely and mix them together thoroughly for the filling.

On a floured work surface, roll the dough into a log, cut it into 12 equal pieces, and shape them into balls.

Roll out each ball into a circle, place about 1 tablespoon of filling in the center, and pinch the edges together to seal the hand pies.

Brush the pies with an egg wash made from the egg yolk and milk.