Prepare the Dough:

1. In a large bowl, combine the flour, warm water, yeast, salt, sugar, and olive oil.
2. Knead the dough until it becomes smooth and elastic.
3. Cover and let it rest in a warm place for about an hour until it doubles in size.

Make the Filling:

1. In a pan, heat olive oil over medium heat and sauté onions, garlic, and bell peppers until soft.
2. Add the tomato sauce and paprika, stirring well to combine.
3. Incorporate the tuna (or preferred protein) and mix thoroughly.
4. Stir in chopped green olives and hard-boiled eggs, then let the mixture cool slightly.

Assemble the Empanada:

1. Preheat the oven to 375°F (190°C).
2. Divide the dough into two portions and roll each out into a thin sheet.
3. Place one sheet on a baking tray, spread the filling evenly, and cover with the second sheet.
4. Seal the edges and cut small slits on top to allow steam to escape.

Bake to Perfection:

1. Brush the top with an egg wash for a golden finish.
2. Bake for 35-40 minutes or until the crust turns golden brown.
3. Allow to cool slightly before slicing and serving.