You'll love the berry flavor of this Aroniaberry Triple Berry Pie. Using pre-made pie crusts, our frozen aroniaberries, and other frozen berries, you can make the pie in less than 30 minutes. And it is so easy to make, you'll want to make it every week, or bake it for all your special gatherings.
Add berries, sugar and lemon juice to a large saucepan over medium heat. Simmer, about 5-10 minutes, stirring occasionally. Mix cornstarch with a small amount of water until smooth. Stir cornstarch into berry mixture until thickened, about 2-5 minutes. Remove from heat and stir in the butter. Pour mixture into unbaked pie shell. Add lattice top. Pinch the edges of the top and bottom pie crusts together Brush a thin layer of beaten egg white over the top of the pie and sprinkle lightly with sugar. Bake at 400 degrees F for 40-45 minutes. Check pie after about 25 minutes and place a piece of tinfoil over it if the top crust is getting too brown. Remove and allow to cool for several hours before serving.