Razzleberry Pie – Simmer + Sauce

Ingredients

• For the Pie Crust:
• 2 and 1/2 cups all-purpose flour
• 2 teaspoons sugar
• Pinch of Kosher salt
• 1 cup unsalted butter, chilled and diced
• 1/3-1/2 cup ice water, as needed
• For the Pie Filling:
• 2 cups raspberries
• 2 cups blackberries
• 2 cups blueberries
• 1 cup sugar
• 1/3 cup cornstarch
• 1 teaspoon vanilla extract
• 1 egg, blended 1 tablespoon milk, for the egg wash
• Course sugar for sprinkling the crust (optional)