Flour Blend: The all-purpose gluten-free flour blend consists of 4 cups superfine brown rice flour, 1 1/3 cups potato starch (not flour), 2/3 cup tapioca starch. Combine all ingredients in a large zipper-top bag. Shake until well blended. [br]TIP: If you are not sure if your baking dish is big enough, place a cookie sheet, lined with aluminum foil or parchment paper, under your casserole dish. This way, if the juices from the fruit do bubble up too high and boil over, it will not be burning onto the bottom of your oven. Simply remove the foil or paper, and all of your clean up is done.