Estonian meat pies

This fantastic recipe is courtesy of my mother-in-law. Traditionally eaten at Christmas time, these are lovely and wonderful. The quantities quoted here make about 60–70 pies, depending on the size of your glasses, so you can freeze some and save them for later in the year.

500 g pork belly or other cut, must be somewhat fatty
500 ml–1l chicken stock
Onion to taste, diced
1/2 white rice (optional)
2 eggs, hard-boiled, peeled and diced
500 ml milk
50 g or so butter
1–2 tbsp sugar
1/2 tsp salt
1.5 kg flour
Yeast (ratio based on the liquid)
Raw egg to coat

Meat filling:
Cook the rice as per directions on the packaging. In a large pot, cook the meat at a low temperature for about 1-2 hours in the stock (depending on the size of the piece of meat and the pot, you may need extra stock). When ready, remove the meat from the pot, but don't throw out the juices. Put the meat and onions in a meat mincer and mince. Season with salt and pepper, and, if the mixture is too dry, add some of the juices from the pot. Mix in the egg and as much of the rice as needed. Leave to cool for a while, or overnight in the fridge.

Pastry:
Gently heat the milk (don't let it boil) and add the butter, salt and sugar. Mix the yeast in with a bit of the flour, then sieve the entire flour/yeast mixture, then the rest of the flour, into the milk mixture, until quite thick. Mix thoroughly, then leave to rise in a warm place for a while with a tea towel over the top. Once risen, knock it back and leave to rise once more.

To make the pies, roll out the pastry, take about 3/4 of a tablespoon's worth of the filling, and place it about 2/3 of a glass's width from the edge of the pastry. Place a row of the filling on the pastry, then fold the edge over and cut out the pies and place on a baking tray. Once you've filled a tray, paint with the egg for colour, then bake at 180 degrees for about 20 minutes or so. You may want to turn the tray halfway through.

Repeat as necessary. Add in your own ingredients as desired.