London's burger boom has reached new heights. Try U.S. President Barack Obama's favourite at Soho's Kua 'Aina - the London outpost of Hawaii's famed burger and sandwich grill.
Using the traditional method employed by the restaurant owners since 1975, meat, chicken and fish are all chargrilled over lava rocks with homemade marinades and seasonings. Juices from the meat drip onto the rocks under the hot grills, flaring back into the meat and producing a smoky, rich flavour that locks all the moisture and tenderness into the meat.
Obama always orders this lava-grilled half-pound avocado burger when he visits his home state and was once seen ordering 24 burgers to feed his staff.