I’m cheating here, because this isn’t entirely cooked in the oven, but the brief roasting is what helps Brussels sprouts achieve their optimum potential, instead of waterlogging them in a saucepan. I ate a similar dish at Rotisserie Georgette in New York—a restaurant that specializes in roast chicken—then came straight home and made this. It’s been a regular in my house ever since, and not just at Christmas.