This upper-crust eatery is foremost a ‘round-the-clock bakery, with a convivial bustle in the open-plan kitchen and the constant trickle of customers heading in for a freshly cooked breakfast, lunch, dinner or snack. The bright and pretty Newton Center spot goes from day to night easily, morphing from pastry-plus-caffeine stopover to neighborhood bistro with its suave white tablecloths and a wine and beer list. Though the menu spans from pressed sandwiches to oven-roasted salmon, the bakery’s signature voluptuously filled sweet and savory pies--everything from classic chicken pot pie to chocolate cream--are the biggest draws.