Saskatoon Pie

Ingredients

• 6 cups All purpose flour
• 2 tsp Salt
• 1 cup Unsalted Butter
• 1 cup Vegetable Shortening
• 1 large Egg
• 1 tablespoon Vinegar
• Splash Water
• 5 Cups Saskatoon Berries
• 1/2 cup Sugar
• 1 tablespoon Sugar
• 3 tablespoons Cornstarch
• 2 tablespoons Unsalted Butter
• 1 beaten Egg
• 1 tablespoon Water