Yesterday on this blog I talked about the string of restaurant and retail closings in our neighborhood. Well, this is the part where I put my foot in my mouth. It turns out not everyone is hurting. While some neighborhood businesses are closing, others are now expanding. Neighborhood chef Kent Rathbun, for one, is opening his seventh venture: Blue Plate Kitchen at Preston Center. This eatery will offer up a gourmet menu in a casual setting. The restaurant will be next to the Flying Fish, and it’s set to open sometime late next month.