Cranberry Walnut Cheesecake Bars

for the cranberry puree

fresh or frozen cranberries

granulated white sugar

water

zest of 1/2 orange

for the crust

walnuts

graham cracker crumbs

sugar

butter, melted

for the cheesecake

full-fat cream cheese, room temperature

Vermont Creamery Crème Fraîche, room temperature

powdered sugar

vanilla extract

large eggs, room temperature