Cut the butter from the refrigerator into flour with baking powder and salt.
Chop with a knife into crumbs.
Pour in the kefir, beat in the egg.
Knead the pliable dough. Add flour until it stops sticking to your hands and dishes.
Let the dough lie in the refrigerator for 30 minutes and knead it into shape. Or immediately knead into shape and send to the refrigerator. Prick the bottom with a fork.
Filling. Cut the sausage and bacon or one of them.
Cut the green onions. I have leeks. It is convenient to cut lengthwise in advance and wash the stem, then cut it into small pieces and put it in a box with a lid in the refrigerator. Then we take it out and add it to salads or pies.
Add grated cheese, onion and corn to the meat.
Pour the sour cream or yogurt. Beat in the eggs and add the starch.
Salt to taste.
Mix together with the seasonings.
Fill the base of the dough with the filling.
Put in a preheated 190* C oven for 40-45 minutes.
The filling in the oven will rise, but then fall when it cools.