Triple-Berry French Toast Casserole

Every time I make this, I remember that it is actually easier than most breakfasts.  And even though the word "sugar" pops up many times in this recipe, I think it's probably healthier than regular French toast with syrup.  

First of all, it's baked instead of butter-fried on a griddle (which is how I make regular French toast).  It's got whole lot of whole berries--healthy, right?  And after we dust it with powdered sugar at the end, we don't add whipped cream or syrup or anything else--it's good with just a light sprinkle.  

Caveat: I let everyone dust their own, because it's so fun to use the powdered sugar wand . . . and they don't understand the word "lightly"--so maybe only my French toast feels slightly-healthier-than-regular-French-toast.

Maybe I am just justifying how often I want to make this breakfast, because no matter how you slice it (but you should slice it into 1-inch cubes), it's DELICIOUS.  And if you make more than one pan, it's an easy way to feed all your company.