Blueberry french toast I've also made a version of this many times. I use whole wheat bread, and when making the sauce, I use very little sugar. If it needs sweetening, I'll add frozen concentrate juice. Also, I do use frozen berries for it and don't find it to be a problem. I don't thaw them before cooking, and don't let it sit overnight. I don't sprinkle with powdered sugar either. Usually serve with blueberry sauce or maple syrup.