Preheat the oven to 200°C/ 180°C fan/ gas mark 6/ 400°F
Grease the flan dish with butter
Peel the potatoes and cut into similar size pieces. Set them on to boil in plenty of salted water. They should take 15-20 minutes, depending on size
Chop the onion finely
Chop the raisins
Grate the nutmeg
Cut the anchovies lengthwise, if they need it, to make about 12 strips. Keep the oil from the tin.
For the savoury mince pie:
Put the mince in a bowl with the flavourings. Mix together thoroughly(Onions, raisins, nutmeg, tomato puree, horseradish, Worcester Sauce, salt and pepper)
When the potatoes are cooked, drain well and mash until smooth. Add the butter and mash again. Add the flour to the potato and mix thoroughly. (Use the masher or a spoon)
Put the potato dough into the flan dish and press into the edges
Spoon the minced beef mixture into the flan and smooth
Arrange the anchovies on top of the pie in a lattice
Cook for 35-40 minutes, until the pastry is a light golden brown.