STEP 1:
Freeze the flour & sugar in a food processor bowl while you cube the butter. Add the cubed butter to the flour & sugar & freeze for 5 minutes, then remove and pulse into pea size chunks.
STEP 3:
Combine strawberries, blueberries, sugar, lemon zest & juice & let it macerate for 1 hr. Strain & discard the liquid & toss the fruits in cornstarch.
STEP 6:
Beat an egg & brush the crust with the egg wash and sprinkle with turbinado sugar. Bake for 60 min at 350F. Allow to cool & top with vanilla ice cream!