Use this recipe for All-Butter Pie Dough.
Thawed frozen berries will work here. I used 1 cup each cranberries, blueberries, and raspberries.
Foil Hack: When you want to slide something off a rimless baking sheet after baking but don't want it to bubble over in the oven while it bakes, line the baking sheet with foil and fold up all 4 edges to contain any leaks during baking. When it's time to slide, just flatten one edge of the foil, and voilà!
Crème de violette or Grand Marnier(R) can be used in place of elderflower liqueur.