Preheat the oven to 190°C (375°F).
Heat the olive oil in a pan over medium heat. Add the chopped onion and garlic, cook until soft.
Add the minced lamb, cumin, coriander, cayenne pepper, salt, and pepper. Cook until the lamb is browned and cooked through.
Stir in the chopped parsley, remove from the heat, and let the mixture cool slightly.
Lay out a sheet of filo pastry and brush it with melted butter. Place another sheet on top and brush again lightly with butter.
Add a portion of the lamb mixture along the edge of the pastry. Roll up tightly to enclose the filling. Repeat with remaining pastry and filling.
Place the pastries on a lined baking tray and brush them with a little extra melted butter.
Bake in the preheated oven for 20-25 minutes, or until the pastry is golden and crisp.