Remove the pineapple "crown" with leaves and cut longitudinally in half. Cut pulp out with a sharp knife and dice. Cut chicken into cubes. Chop the green onions and coriander leaves. Fry walnuts in a dry frying pan for 3 minutes and finely chop. Mix chicken, pineapple, greens and nuts in a bowl. Season with mayonnaise and curry, and salt. Put the salad into the pineapple half and sprinkle with hot pepper. Fasten the "crown" with toothpicks.