Hi Linda :-) I think I can give you an idea/recipe for Blueberry filling but I don't have time to post it now. I'll try to do it later today. If you can get a copy of The Cake Bible by Rose Levy Beranbaum, the information I want to get to you is in it. It is an excellent resource to have in your cookbook library and won The International Association of Culinary Professionals Cookbook of the Year Award. If you can get your hands on a copy, it would be helpful for the wedding cake you are making and for many others in the years to come. I'll get back to you.