Remove the butter from the refrigerator, cut it into cubes and let it soften for 10-15 min.

Add the flour, baking soda and 1 teaspoon of salt

Knead all ingredients, then add 200g sour cream and knead again.

Place the dough in a refrigerator until preparing the filling.

Slice the onions.

Put the onion slices in a skillet drizzled with oil, cook  until the colour shifts to yellow, but don't brown them.

After cooking, remove the onions from oil and put them in a dish. You will use the onion oil to cook the chicken afterwards.

Chop the boneless chicken breast into small cubes.

Cook them in the onion oil for a few minutes but don't let to get brown.

Remove the oil and mix the cooked chicken with onions, 3 tbs sour cream, 1 tsp salt and pepper.

This mixture will be the filling of the pie.

The dough is divided into one1/3 and one 2/3 pieces.

The 2/3 piece is spread out in a tray up to its edges.

Pour the filling over the dough.

From the other 1/3 piece of dough make the  second sheet, spread it over the filling and grease it with egg yolk.

Place in oven for about 1 hour, until well browned.

Remove the pie from oven, let cool slightly.

It is delicios, and it can be served hot or cold.

Bon Appetite!