Rustic Blackberry Pie with Lemon Zest | DishGen Recipe

Ingredients

• 4 cups fresh blackberries
• ¾ cup granulated sugar
• 3 tablespoons cornstarch
• 1 teaspoon lemon zest
• 1 tablespoon fresh lemon juice
• ¼ teaspoon ground cinnamon
• ½ teaspoon vanilla extract
• 1 tablespoon butter, cut into small pieces
• 1 package refrigerated pie crusts (2 crusts) or homemade equivalent
• 1 egg, beaten (for egg wash)
• 1 tablespoon coarse sugar (optional, for sprinkling)