Preheat oven to 350 degrees | Line two large baking sheets of parchment paper
In a large bowl, stir boiling water into lard until lard is melted. Gradually stir in flour and salt until a very soft dough is formed; cover and refrigerate for 1.5 hours.
Combine beef, pork, veggies, and spices in a very large bowl, mix thoroughly.
Divide dough into 12 equal portions.
On a floured surface, roll out 1 portion of dough at a time into an 8” circle.
Mound 1.5 cups of filling on half of the circle; dot with 1 teaspoon butter. Fold the other half of the dough over the filling and fold edges to seal the crust. Place on baking sheet. Repeat for all 12 pasties.
Cut three slits on the top of each pasty and brush with an egg wash.
Bake for 1 hour, or until golden brown. Rest for 10-15 minutes for eating. Can be served hot or cold.