Butternut Squash Gratin
To make your own creme fraiche, in small bowl stir together 1/4 cup whipping cream (not ultrapasteurized) and 1/4 cup dairy sour cream. Cover with plastic wrap. Let stand at room temperature for 2 to 5 hours or until mixture thickens. When thickened, cover and chill in the refrigerator until serving time or up to 48 hours. Stir before serving.