Make Ahead Butternut Squash Gratin
Homemade Creme Fraiche:
If purchased creme fraiche is unavailable you can make your own. In a small mixing 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.
*Frozen Spinach Option:
If desired, substitute two 10-ounce packages frozen chopped spinach, thawed and well drained. Sprinkle with salt. Omit cooking of spinach.
To serve right away:
Chilling step may be omitted. Bake 10 to 15 minutes for final timing.