Sweet Potato Pecan Pie

Sweet Potato Pecan Pie - - Dough: Unsalted Butter (soften), Sugar, Salt, whole egg (beaten vigorously until frothy (save remainder)), cold milk, All-Purpose Flour, Sweet Potato Filling: sweet potatoes (enough to yield 1 cup cooked pulp, baked), packed light brown sugar, Sugar, egg (vigorously beaten until frothy (reserved from above)), Heavy Cream, Unsalted Butter (softened), [...]