Boil potatoes in a uniform until half-cooked. Peel the onion and potatoes. Cut chicken fillet and potatoes into cubes (about 1-1. 5 cm). Finely chop the onion. Mix everything and add salt.
roll out 500 g of dough. Put the filling on top, not reaching the edges by about 2 cm. To add juiciness, add diced butter to the filling.
Pinch the edges of the dough, forming a pie. From above, make a hole for steam to escape. Transfer to a baking sheet. Brush with beaten egg and sprinkle with sesame seeds. Bake at 180 * C for 45 minutes.