21 cm and 2000 calories

The Mangógrill restaurant in Grafarholt, a suburb of Reykjavik, Iceland is now serving hamburgers made from half a kilo of beef.

And if a customer can finish the burger along with french fries, ketchup and a soda within 10 minutes, the meal is free.

According to owner Magnús Gardarsson, the hamburger measures 21 cm in diameter. The bun is specially baked and the burger is garnished with six slices of cheese, bacon, tomatoes, onion and iceberg lettuce.

A nutritionist said a hamburger that size contains 2000 calories, not counting the fries and soda.