This rustic Alsatian Blueberry Tart is a quintessential Summer dessert, hailing from the Alsace region in the Eastern part of France, where blueberries are plentiful. It features a crisp “pâte brisée” (French pie dough) generously filled with fresh seasonal blueberries. Just before baking, a “migaine” (quick custard) is poured overtop the blueberries to create an extra juicy filling with a delicious hint of creaminess.   If you’re visiting Alsace in the Summer, you’ll likely find an offering of this Alsatian Blueberry Tart in most restaurants, cafes and B&Bs. It is an…