Chop the onion to get onion rings.
Boil and mash potatoes.In a bowl mix together, mashed potatoes, shredded chicken pieces, red chilli powder, black pepper powder, pizza sauce, grated cheese and salt.
Fill this stuffing inside the onion rings.Roll the rings in all purpose flour first, dip it in egg and then roll it over oats and rava mix.
Heat oil in a wok, when the oil is hot enough, drop in the onion rings to hot oil and deep fry the onion rings in medium flame till it becomes golden brown.
Drain and remove from oil and keep in absorbent paper.
Serve hot with tomato ketchup.