Prepare the dough by mixing flour and salt.
Cut in the butter until the mixture resembles coarse crumbs.
Add ice water gradually and mix until dough forms.
Wrap the dough in plastic and chill for at least 30 minutes.
Cook the filling by sautéing onion and garlic.
Add the ground meat and cook until browned.
Mix in Worcestershire sauce and thyme; let cool.
Roll out the dough and cut into circles.
Fill the pastry circles with meat filling and seal.
Brush the tops with beaten egg for finishing.
Bake at 400°F (200°C) until golden brown.