EILEEN GANNON’S BLUEBERRY PIE – Sunday Night Foods

Ingredients

• 2 and 1/2 cups (300 grams) all-purpose flour, plus more for shaping and rolling
• 1 teaspoon salt
• 10 Tablespoons ice cold butter, cut into small pieces
• 10 Tablespoons ice cold white shortening, cut into small pieces
• 4 to 6 Tablespoons of ice cold water
• ½ teaspoon white vinegar
• 5 cups fresh blueberries
• 1 cup (200 g) granulated sugar
• 1 teaspoon cinnamon
• ⅓ cup cornstarch
• Pinch salt
• 1 Tablespoon fresh lemon juice
• 1 Tablespoon cold, unsalted butter, cut into small cubes
• Coarse sanding white sugar for garnish
• 1 large egg
• 1 teaspoon water
• Pinch of salt