Knead a dough from the ingredients. Leave it to rise for 30 min. Without kneading again, make balls a little larger than a walnut with oiled hands.
Arrange them in a generously oiled oven dish (I used an 11″ (28 cm) cake form) with a little space between each other.
Sprinkle crumbled feta cheese between the balls. Leave thus prepared buns covered in plastic wrap for 20 min.
Then, smear them with the prepared topping - melt the margarine, add the flour and egg, a little salt and stir well - until you obtain a smooth and homogeneous mixture.
Smear the buns lightly using a brush dipped in the paste, cover with the wrap again for 10 min.
Bake at 356°F (180 °C) with the fan on for about 40 min. They turn out amazing - eat them while still warm with a glass of ayran.