One of the endearing and enduring features of Wallingford is that it is full of little jewels, unique establishments that are often overshadowed and overlooked because of the oversized influence of other places and events. But nestled right in the heart of the neighborhood, on 45th, is a restaurant called Harvest Beat that is quite wonderful. Those of you who peruse Facebook, the newly ungoverned purveyor of discord and distress, might have occasionally seen offers from Harvest Beat in the Wallingford & Fremont group for friends and family discounts for their 5-course prix fixe (fixed price) vegan …