1. Preheat oven to 400°
2. In a large bowl, gently toss berries with sugar, cinnamon and cornstarch
3. Sprinkle lemon (or lime) juice over the mixture
4. Mix thoroughly but gently so as not to crush the berries
5. Sprinkle flour on a work surface and roll out dough to just over 8" to form the bottom crust.  Gently tuck dough into an 8" pie pan
6. Spoon berry mixture into bottom crust
7. Dot with butter evenly over pie filling
8. Roll out top crust and place over the filling.  Pinch crust together at edges.  Not too thin or crust will burn
9. Cut plenty of 1/4" vents in the top crust
10. Bake for 20-25 minutes, until crust is golden brown

Tip: Filling can also be used in tarts or mini pies