Make the green seasoning. Whizz all the ingredients in a blender to make a not-quite-smooth paste, then transfer to a jar. As well as using it in this recipe, leftovers make a great marinade!
In a large bowl, mix the meat with the turmeric, curry powder and green seasoning, cover and leave in the fridge overnight (or if time is against you, at least 2 hours).
Add the contents of the bowl to a large pan, add 100ml (3½fl oz) water and pour over the coconut milk. Bring to the boil, reduce the heat to a simmer, cover and cook for about an hour until just tender, adding a touch more water if it dries out, as you need enough volume to cook the potatoes later.
Season, adding salt, pepper or more curry powder to taste. Add the vegetable mix and the chard and cook for 20–30 minutes until tender and the liquid has largely cooked away. Add a squeeze of lime juice to taste.