Watch: How to very, very, very finely chop an onion

Chef and restauranteur Marco Pierre White demonstrates how to seriously finely chop an onion on The Ray D'Arcy radio show in Dublin, Ireland.

Not just finely chop, but seriously super finely, and the chef also explains why you'd want to bother. White is one of the original "celebrity chefs," and was the youngest chef ever to have been awarded three Michelin stars. He was also the mentor to chefs including Gordon Ramsay and Curtis Stone.