put the flour and salt in a mixing bowl
cut the cold butter into tiny pieces and work it into the flour, when it resembles crumbs it's ready for the water--see notes for food processor instructions
mix the water and one egg yolk together
pour into the flour and mix until it comes together
turn it out on a clean counter and knead lightly until it comes together into a dough
wrap in plastic wrap and chill at least 30 minutes
when you're ready to bake preheat the oven to 445˚
line two baking sheets with parchment
weigh the dough if you have a scale and divide into 10 equal pieces of dough
roll each piece of dough into a 7-8 inch circle
add a heaping half cup of filling
lay the circle over on itself
press together
starting at one end press your thumb down on the seam while pulling it out with the other hand into a little point and then fold it over
repeat all the way around the seam making crimps as you go
crimping may feel awkward but once you get it it's fairly easy
place five pastes on each prepare sheet
make an egg wash with the remaining egg yolk and mix it with a Tablespoon of water
brush each pasty with an egg wash
bake for 20 minutes at 445˚ then reduce the heat to 345˚ and bake for another 15-20 minutes until crispy and browned underneath
cool a bit before eating