1.Preheat oven to 180°C (160°C fan-forced). Place chicken, kidney beans, passata, taco seasoning, chilli powder, spring onions and most of manchego cheese in large mixing bowl and stir to combine.
2.Stir chicken stock and cornflour together in small mixing bowl and add to chicken; stir well to combine. Spoon evenly into ramekins and place on baking tray.
3.Cut pastry into shapes (squares or rounds) 1cm or 2cm larger than the rim of ramekins. Top pies with pastry, sprinkle with a little sea salt and bake for 25 minutes until pastry is golden and filling is heated through.
4.Remove pies from oven and serve with a dollop of sour cream and a sprinkling of coriander.