Ingredients:

• 1 1/4 cups all-purpose flour
• 2 tablespoons sugar
• 1/2 teaspoon salt
• 8 tablespoons cold butter
• 1/3 cup ice water
• 3-4 cups mixed berries
• 1/4 cup cornstarch
• 1-2 tablespoons lemon juice
• 1 egg (for wash)
• Coarse sugar for topping