In a mixing bowl, combine flour and salt.

Cut in the cold butter until the mixture resembles coarse crumbs.

Gradually add cold water, mixing until the dough comes together.

Roll out the dough and cut into circles.

In a skillet, cook the ground beef or chicken with diced onion and minced garlic until browned.

Stir in cumin, paprika, and olives; mix well.

Place a spoonful of filling onto each dough circle.

Fold the dough over the filling and seal the edges.

Preheat the oven to 375°F (190°C).

Place empanadas on a baking sheet and brush with the egg wash (beaten egg mixed with water).

Bake for 25 minutes or until golden brown.