In early October, husband and wife team Kevin and Rosemarie Brown open their second Blueberry Muffin restaurant.  The unit is in the Stop & Shop Plaza on Summer St. in Kingston, a community in the greater Boston area. The Blueberry Muffin is a neighborhood café bakery concept that features a fresh breakfast and lunch menu along with a large selection of baked-on-site pastries, muffins, cakes, donuts, etc.  The first Blueberry Muffin has been operating on State Rd. in Plymouth, also part of greater Boston, in the South Shore area, for over 15 years.