I discovered this terrific combination of blueberries and rhubarb long ago while I was doing a radio show to publicize The Pie and Pastry Bible and a listener called in to ask if I had a recipe for this Amish pie her mother used to make. I have to admit that I never would have come up with such an unusual mélange on my own. I was so curious, however, that I wasted no time before trying it. Fabulous!