Mix together the peanut butter, soy sauce, fish sauce, chilli paste, sugar, garlic, ginger, coriander, lime and coconut milk together in a large bowl. Leave to sit while you prepare the other ingredients.
Heat the oil in a large pan (I used a wok) and then add the chicken and seal all over. Add the pepper and fry until softened.
Add the peanut sauce and heat through. Serve over your carb of choice with chopped coriander sprinkled on top.