I think that's very true. It's really only in recent times that all kinds of local and regional dishes have found their way onto restaurant menus, and then only in certain places too. Offally restaurants like St John's and Silk Road in London are good examples, tho Menudo is a huge favourite in local Mex/NewMex restaurants in the US Southwest and is almost a weekend institution.I suppose there can often be a difference between what people eat at home and what is found on restaurant menus.