Add apples to a pot with the cinnamon, sugar, butter, and flour
Place the pot over a medium heat
Stirring regularly cook the apples until you have a smooth but thick sauce.
If the mixture begins to get too thick you can thin it by adding a splash of water
The apples don't need to be cooked through as they'll get cooked further in the oven.
Pie dough
In a medium sized bowl combine the flour and salt
Cut the lard into small chunks and then add it to the flour in batches
Mix the lard into the flour using a pastry cutter or fork, until it looks like coarse oatmeal
In a 1cup measuring cup beat one of the eggs and add the vinegar to it. Add enough water to make a full cup
DO NOT add all the liquid to the flour. Add in about a tablespoon at a time until the dough just comes together (you won't use all the liquid, you can discard the rest)
Turn the dough out onto a lightly floured surface and roll it into a ball. Roll out the dough to approximately 1/8 inch thick.
Use a cookie cutter, glass, or a jar to cut circles of dough 2-3 inches in diameter.
Assembly and baking
Place half of the dough circles onto a tray lined with parchment.
Scoop a few spoonfuls of filling into the centre of each. Make sure the filling does not go all the way to the edge.
Beat the other egg in a small bowl with some water to make an egg wash. Brush it onto the dough all the way around the filling using a pastry brush or your finger.
Place the remaining dough circles onto of each. Then use a fork to crimp and seal all the edges.
Lightly brush the tops with some of the egg wash.
Use a sharp knife to cut two vents into the top
Place the assembled pies into the pre-heated oven for 30-35min or until golden brown on top.
Notes
I love cinnamon so I can be a little heavy handed with it, feel free to adjust to your taste.