Central Asian
Mix the flour, water and 0.5 tsp of the salt into a firm dough, knead for 5 minutes, cover and rest for 30 minutes.
Roll the dough into a thin sheet about 50 x 60 cm, spread with the softened butter, roll up tightly into a log and chill for 20 minutes.
Cut the lamb and fat into 5 mm cubes, finely chop the onions and mix with the cumin, black pepper and the remaining salt.
Cut the log into 8 pieces, stand each on its cut end, press flat and roll into a 15 cm circle.
Put about 100 g of filling in the center of each circle, fold the edges over into a triangle and pinch the seams tightly.
Place seam side down on a lined baking sheet, brush with the beaten egg yolk and sprinkle with the sesame seeds.
Bake at 200C for 30 to 35 minutes, until deep golden, and rest for 5 minutes before serving.