Heat the oil in a pan, add the onions and cook for about 5 minutes over a medium heat.
Turn up the heat, add the garlic, fresh chilli and the mince, and cook until browned.
Add the potato, 1 tsp turmeric, thyme, tomato puree and the water. Cover and simmer for 15 minutes until the potatoes are cooked through.
Remove the lid, and cook for a further 5 minutes.
Season with salt, pepper and hot pepper sauce to your taste.
Leave to cool.
Heat oven to 220C/Gas 7.
Roll out the pastry to around 5mm thick. Cut 6 x 15cm circles (use a plate as a guide).
Divide the meat and potato mixture between each circle of pastry, piling it on one side.
Mix the egg with the other teaspoon of turmeric, brush around the edge of each circle. Fold over the pastry and use a fork to seal the edges.
Lay the patties on a greased baking tray, and brush with more of the egg wash.
Bake for 25 - 30 minutes.