Put the couscous, sultanas and curry paste into a large bowl, add the boiling water and mix together. Leave to stand for 5 minutes.
Fluff up the couscous with a fork, then mix in the tomatoes, pepper, onion, coriander, coconut and chicken.
Mix the lime rind and juice with the oil and a little seasoning. Add to the couscous and toss together. Spoon into bowls and serve.