Make the Dough: Mix flour and salt in a large bowl. Add butter, using your fingers to blend into a crumbly texture. Gradually add water, mixing until a dough forms. Wrap and chill for 30 minutes. Prepare the Filling: Cook onions in a pan until translucent. Add ground beef, cooking until browned. Stir in spices, then remove from heat. Once cooled, mix in eggs and olives. Assemble: Roll out the dough and cut into circles. Place a spoonful of filling in each, fold over, and seal the edges. Cook: Bake at 200°C (400°F) for 20-25 minutes, or until golden. Pro Tips:

For a flakier crust, incorporate a tablespoon of vinegar into the dough mixture. This helps prevent gluten formation. Seal the edges of the empanadas with a fork to ensure they do not open during baking or frying.