Shape into cutlets and fry till light brown. Then add a little chilled water and knead to a smooth dough. Sprinkle a little flour on the board and roll out the dough into a thin round. Apply butter all over, sprinkle dry flour, fold it applying butter to every fold. Form into a ball and roll out again.
Repeat applying butter, folding and rolling out, till the butter is over.
Finally, roll it out large enough to line a pie dish of 9 inches. Fill in the stew and cover the top neatly with another thin round of the pastry. Seal it firmly and glaze it with egg yolk. Fork it in a few places and bake the pie in a pre-heated oven at gas Mk 4 till golden brown.