Preheat oven to 200°C (or 180°C fan bake).
Pat chicken dry and dice. Toss in a bowl with butter curry paste. Heat butter and oil in a frypan over medium heat and cook chicken for 5-7 minutes, until browned. Add coconut cream and simmer for a further 5 minutes, until thickened.
Meanwhile, cut the pastry into 16 squares total for the top and the bottom of each pie. Grease a muffin tin and place a pastry into each muffin cup, reserving 8 for the lids.
Fill the pastry cups with butter chicken mixture and place a pastry lid on top. Use a fork to crimp together the edges of the pastry.
Whisk an egg, brush over top of the pies and sprinkle with sesame seeds. Bake in oven for about 20-25 minutes, until puffed and golden.
Serve with tomato sauce and enjoy!