My strongest opinion on Thanksgiving sides is that whenever possible, they should come in a casserole dish (or its chic French cousin, a gratin). I don’t mean that your sides should be limited to things that swim in cream, cheese, butter, or a happy combination of all three — although one dish in this category is highly welcome on my table — I simply mean that sides like this, that is baked in dishes with walls, tend to excel at holding up to resting times, reheat well, and stay warm longer.

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