It's pretty hard to find good Mexican food in London but Wahaca does well.  It's not typical 'Tex-Mex' with burritos and fajitas abound, it has a lot of the more unusual dishes, and excellent margaritas and Mexcian beers too.  This month they are serving up grasshoppers in their Southbank Experiment restaurant, which is cleverly located inside a few adjoining containers attached to the side of the South Bank Centre. Yum!