Boil chicken with some salt. Shred them when cold. Take 3-4 tbsp of mayonnaise and mix it with shredded chicken. Add salt and pepper and a tbsp of ketchup. Just before serving, spread the chicken-mayo paste on crackers, decorate with ketchup and corrander. You can add a drop of green chutney/mustard paste on it as well. Serve immediately, otherwise after few minutes the crackers will turn soggy