Grease a clean folding grid with nonstick spray.
1 Unroll one sheet of pastry and place carefully on the cold braai grid. Top evenly with the onion and spinach. Sprinkle the soup powder over.
2 Sprinkle the feta, mozzarella and Parmesan cheeses on top.
3 Unroll the second sheet of pastry and put on top of the filling. Use a fork to seal the edges.
4 Brush the pastry with the whisked egg on both sides, close the braai grid and braai over moderate coals for 20-30 minutes or until golden brown and done on both sides.
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