Prepare all ingredients, wash vegetables. Prepare food foil, baking dish, sesame seeds and spices.
Take a bowl and mix yogurt, eggs and salt in it. In another bowl, mix flour, baking powder and sugar. Combine both masses and knead the dough. Pour vegetable oil into it and knead the dough.
Place the dough in a bag and refrigerate for 30 minutes. At this time, prepare the filling. Cut the fish, remove the skin and bones, cut into pieces.
Lightly fry the pieces of fish in a dry frying pan, place them on a dish and add salt. Fry the onion in vegetable oil, adding sugar and black pepper. Then prepare the puree. Turn on the oven to preheat.
Roll out the dough and place it in the mold, making a side. Place half of the fried onion on the dough. Add the fish, then the remaining onions, then the mashed potatoes. Mix yolk and cream, apply to mashed potatoes. Garnish with sesame seeds.
Bake the pie for 15 minutes at 200°C, then cover with foil and another 25 minutes at 180°C. Remove the foil and brown under the grill for 5 minutes. Let the cake rest in the pan for 5 minutes, remove the sides, and carefully transfer to a serving dish.
It is best to decorate the pie with herbs.