Prepare ingredients for fish and potato pie with kefir. Melt the butter. Separate the yolk from the white for lubrication. Peel the potatoes. Cut into cubes. Open the saury and cut into medium pieces. Wash the green onions and chop finely. Tip: Saira fishing occurs from August to early December. It’s good if the manufacturing date on the lid corresponds to these months.
Prepare the dough. Add flour, baking powder and salt into a bowl and mix. Break the egg, pour in kefir and melted butter. Add flour in portions, knead into a thick dough, cover with cling film and leave for 30 minutes.
Prepare the filling. Mix potatoes with onions and saury. Salt, pepper, add mayonnaise, stir.
Prepare fish and potato pie with kefir. Roll out the dough with a rolling pin or stretch it with your hands, place it on a baking sheet lined with baking paper. Place the potato and fish filling in the middle. Make cuts along the edges. Fold the strips of dough towards the center, as if braiding them. Brush the top with yolk. Bake in an oven preheated to 180-190 degrees for 1 hour.
Serve fish pie with kefir potatoes cold or hot.