Sift together flour, baking powder, and salt in a bowl.

In a separate container, mix shortening and hot water until combined.

Add lemon juice and egg yolk to the shortening mixture and mix well.

Gradually stir the wet ingredients into the dry ingredients until a dough forms.

Press half of the dough into the bottom of a pie plate.

Fill the pie with your desired meat mixture.

Top the pie with the remaining dough.

Bake in a preheated oven at 425°F (220°C) for 25 minutes, or until golden brown.