Ever since I’ve been a food writer (for several decades now), I’ve kept a file of recipes that serve as inspiration for my own creations. The folder is filled with newspaper and magazine clippings, and with hand-written or copied recipes friends have shared.

Several weeks ago I spotted a recipe in this cache for a gratin of red onions. Cooked slowly in the oven with garlic, thyme, and white wine, they were then covered with crème fraîche and cheese. The concept of this dish became the starting point for the roasted red onion tart featured here. Continue reading →