Blueberry Rhubarb Pie with crumb topping Bake any prepared pie shell as directed on the package. Cool. For pie: Heat oven to 425 degrees. Filling: Toss together the following ingredients. *Note. You can lessen the tartness of the rhubarb by varying the amount of Blueberries vs. Rhubarb for the filling. For sweeter flavor, add more blueberries and less rhubarb making certain that the total amount of fruit … Continue reading the story "Fran’s Favorite Lavender Rhubarb Blueberry Pie"