A question about a recipe: Thomas Keller's Leek Bread Pudding

I haven't tried, but I don't think there'd be any trouble with it as long as the amount you make fits nicely in the pan you choose (not in too thin of a layer, but not at risk of overflowing). You'll just need to keep an eye on it. Cover it with foil if it's browning too much before it sets, for example.