Rhubarb Upside-Down Cake with Orange Zest
Tender pieces of tart rhubarb balance perfectly with the brown-sugar topping of this vanilla- and orange-scented cake. Baking the cake in a cast-iron skillet helps the rhubarb caramelize, creating an unfussy but beautiful topping. To make the cake shine even more, serve it with softly whipped cream or a scoop of vanilla ice cream.