We really enjoyed this dish for our Christmas brunch, but it would be fabulous at any time of the year. I am not sure where I got this recipe, but I suspect it is one of Lucy Waverman's. This is the preamble to the recipe, "...my most requested brunch recipe. Challah, brioche, of even plain white bread will work well if the bread is thinly sliced. You can also add layers of cooked vegetables such as asparagus, spinach or mushrooms". I prepared half the recipe the day before Christmas to serve 4 people, and it was so easy to bake it off as we opened presents. Cooking time does not include the passive time when made ahead.