There are so many ethnic food places here, so I'm eating around the world without leaving London and this week I had Argentinean food at Constancia. It's located in Bermondsey which is rapidly growing into London's go-to place for foodies.
When I walked into the cosy restaurant, I was quickly shown to my table by a lovely Argentinean lady who took care of us for the rest of the evening. In my book, when the staff is from the same country as the food, then you will most likely get the real thing.