In a bowl, mix potatoes, onion, chat masala, chilli powder, salt and tomato ketchup together.
Arrange the salted biscuits in two plates. Take a little mixture, make a round shape , flatten it and keep it over a biscuit. Repeat the same for all.
Now, top them with tomato piece and decorate with sev. Krackjack sev puri is ready to serve.
