A US restaurant has cooked up the world's largest meatball, weighing in at more than 15 and a half stone.

Matthew Mitnitsky, owner of Nonni's Italian Eatery in Concord, New Hampshire, said the 222.5lb meatball was authenticated as the world's largest by state weights and measures officials.

The Guinness Book of World Records confirmed the monster meatball as a record breaker and presented Mr Mitnitsky with a plaque.