Sift flour, add water, salt and beaten egg.
Knead a stiff dough. Transfer to a clean bowl, cover and leave at room temperature for 1 hour.
Melt butter, cool to room temperature. Roll out the dough into a layer 1-2 mm thick. Using a brush, brush the surface of the dough with melted butter.
Roll the dough into a tight roll, wrap in cling film and refrigerate for 1.5-2 hours to set the butter.
Cut the chicken thigh fillet into cubes with a side of 1 cm. Finely chop the onion, mix with chicken, salt, pepper and cumin.
Cut off 50 g circles from the dough roll. Flour the work surface. Roll out the dough into triangular patties. Put the filling in the center of the cake and form a triangular samsa.
Lubricate the samsa with a mixture of yolk and warm water, sprinkle with sesame seeds. Bake samsa for 10-12 minutes until golden brown.