For the dough:
500 g of all-purpose flour
270 ml of milk
1 egg
30 g of vegetable oil
20 g of butter
6 g of instant dry yeast
1 tsp of salt
1 tbsp of sugar
For the filling:
300 g of Circassian cheese or cottage cheese
100 g of Bryndza cheese
100 g of mozzarella or any other cheese
salt to taste