Blueberry Pie

5 cups fresh blueberries (or 20oz package frozen unsweetened thawed blueberries)
1 cup sugar
1/4 cup flour (if using frozen, increase flour to 1/3 cup)
1/2 tsp lemon peel
2 tsp lemon juice
1 Tbs butter

375 degrees
20 minutes with foil
25 minutes without foil

Pie Crust