Method
Preheat the oven to 220°C/428°F/Gas Mark 7.
Pour flour into a bowl and season well. Coat the meat with seasoned flour.
Heat half the butter in a heated pan and add the meat. Sear all over until golden brown.
Add the vegetables, herbs, ale, and stock. Bring to a simmer, then cover with a lid and gently simmer for 1 hr. When cooked, season, add the remaining butter, and pour into an ovenproof serving dish.
Brush the edge of the dish with the beaten egg. Roll out the pastry using as little flour as possible and place it over the dish. Pinch the edges of the dish so that the pastry will stick to it and trim off any remaining pieces of pastry from around the edge. Brush the pastry top thoroughly with the remaining beaten egg and place on a baking tray.
Top Tip - Make sure the filling is cooled slightly before adding the pastry otherwise the pastry will begin to soften and will be hard to manipulate into the pie top style you're after.