Minced Beef Pie

1. Preheat the oven to 200C/400F/Gas 6.
2. Heat the oil in a deep frying pan and fry the beef mince for 4-5 minutes, breaking it up with a wooden spoon as it browns.
   4–5 minutes
3. Add the onion and cook for 2-3 minutes, then stir in the tomato purée and cook for 2-3 more minutes. Stir in the flour and cook for a further minute, then add the chopped mushrooms, the stout or beef stock and a couple of dashes of Worcestershire sauce. Bring to the boil, then reduce the heat, cover the pan with a lid and leave to simmer for 20 minutes. Set aside and leave to cool, then turn the meat mixture into a one litre pie dish.
   2–3 minutes20 minutes
4. Roll out the pastry on a floured work surface until it is slightly larger than the pie dish. Gently drape the pastry over the dish, pressing firmly onto the edges. Trim, then shape the edges into a fluted shape.
5. Cut some leaf shapes out of the pastry trimmings and decorate the top of the pie, sticking them to the pastry with the beaten egg yolk.
6. Make three or four slits in the pastry to allow the steam to escape, then brush the pie with the rest of the beaten egg yolk and bake in the oven for 20-25 minutes, or until golden-brown.
   20–25 minutes
7. To serve, slice into wedges.

Cooking notes

When scaling protein-led dishes, weigh the meat rather than counting pieces, and remember that the pan size limits how much you can sear at once.

For volume-to-weight conversions of any ingredient — flour, sugar, butter, salts — use the ingredient converter. To translate the recipe's oven temperature between °C, °F and gas mark, see the temperature converter.

When you scale this recipe up or down, remember that cooking time does not scale linearly. A doubled cake takes longer, but not twice as long; a doubled soup takes roughly twice as long. The cooking-time guide gives sensible starting estimates by dish geometry.