I am starting to clean my freezer for Pesach and have lots of leftover challah. Any ideas not just french toast or garlic bread which my kids are tired of.
Make a delicious challah kugels (sweet, with apples, raisins, walnuts, sugar, eggs, oil, cinnamon, and vanilla. Break the challah up or cube it, soak in some water or a little juice, add the other ingredients, put in a round pan, sprinkle the top with lots of cinnamon, bake at 350 until browned nicely and voila! Or make baked stuffing as a side dish, with lots of sauteed onions, mushrooms, celery, spices, etc.
I blend leftover challah and use as regular breadcrumbs which I use for a number of things.
As a side tip, when using breadcrumbs or matzha meal to coat cutlets, add some sesame seeds to the crumbs and fry. It looks very pretty when served bec seeds stay white.