Double-crust:
If you're a novice, watch this video for directions.
(This is a rich traditional-style crust, so it's not super-healthy.)
2 1/2 c all-purpose flour
1 tsp sugar (optional)
1/4 tsp salt
2 sticks (1/2 pound, or 1 c) cold unsalted organic butter
6 Tbsp ice-cold water

Filling:
*4 c blueberries
*2 c pitted cherries
1/4 c unsweetened fruit juice concentrate (orange or grape) or maple syrup
2 Tbsp starch (tapioca or arrowroot)
2 tsp vanilla or 1 Tbsp dark rum
1/2 tsp cinnamon
1/4 tsp freshly grated nutmeg
1/8 tsp salt
* You can use other berries (and/or combos) like raspberries, saskatoons, huckleberries...

Make a double crust.

Combine all filling ingredients in a bowl.

Line pie plate with pastry. Pour in filling. Add top layer of pastry. Brush with egg yolk for a golden hue (optional).

Bake at 425 in the lower part the oven for 10min.
Lower the temperature to 375 and bake for 50min.
If the edge of the crust starts to brown too much, cover it with tinfoil.
Let cool to room temperature before serving.

Enjoy!