Add oil to a frying pan and sauté the onion and garlic until tender. Add the coriander, turmeric and cumin and stir for a minutes or so. Lower heat to medium-high and cook the mince, add the stock and stir through. Once cooked turn off the heat and stir through the mint and feta.

Pre-heat oven to 200 degrees C (400 degrees F). Cut the pasty into 9 squares. Hold the pasty square in your hand and add 2 teaspoons of the filling. Add a little water to the edges of the pastry and fold the corners together so you have a triangle. Using a folk, crimp the edge well. Repeat until all the pasty is used.

Add to a baking tray and brush with the egg white and water wash. Cook for 10 minutes or until the pastry is lovely and golden.