500 g (1 lb) boneless cooked chicken, skinned and cut into 10 cm/4 inch strips
150 ml (1/4 pint) thick bottled mayonnaise
150 g (5 oz) natural yoghurt
1 teaspoon curry paste
juice of 1/2 - 1 lemon
2 dessert apples
4 celery stalks, chopped
4 spring onions or 1 small onion, finely chopped
100 g (4 oz) green grapes, halved and deseeded
75 g (3 oz) shelled walnuts, coarsely chopped
salt and freshly ground black pepper
1 small lettuce, shredded