Dish of the Week: Pho Pho has been called Vietnamese penicillin; it’s warm goodness certainly seems healing. And for a long time good pho was hard to come by in the District. Sure you could go to Nam Viet in Cleveland Park, Froggy Bottom Pub, or Miss Saigon in Georgetown. But it was best to go to Pho 75 in Rosslyn or one of its other locations. At its best it’s a fragrant and…