Alex Keating posted Upside Down Potato & Onion Tart ~ red potatoes, thyme, onions and three cheeses! The onions caramelize while the potatoes are cooking and when you turn them out of the pan they are gorgeous on the plate. to his -food stuff- postboa.
This onion tart recipe evolved from the apfel wehr, my Swiss aunt's recipe for a traditional Swiss apple tart. Chilling the tart shell in the fridge for 2 hours before blind-baking will help prevent the pastry from shrinking.