In a medium bowl, combine all-purpose flour and salt. Gradually add warm water, mixing until the dough comes together. Knead for 5-7 minutes and let rest for 30 minutes.

In a bowl, mix ground beef, grated onion, black pepper, and salt until evenly combined.

Roll out each dough piece into an 8-inch circle, place the filling on one half, fold and seal the edges.

Heat vegetable oil in a large saucepan. Fry pastries for 4-5 minutes on each side until golden brown.

Remove pastries from oil and drain on paper towels. Serve warm, possibly with yogurt or tzatziki.