All the food sections and blogs are talking about what they think will be the food trends in 2011. Lots of pie, lots of macarons, lots of cocktails…but one that we’ve seen neglected in D.C. has already come to life: hash. The dish has stealthily made its way on to a number of menus across town, and the version at Birch & Barley made it on to our list of favorite dishes in 2010.