Blueberry Lattice Top Pie

Ingredients

• 2 ½ cup all-purpose flour
• 1 Tbsp sugar
• 1 tsp salt
• 3 Tbsp vegetable oil
• 1 cup cool unsalted butter, cut into pieces (does not have to be ice cold)
• ¼ cup cool water
• 2 tsp white vinegar or lemon juice
• 4 cup fresh blueberries
• 1 medium apple, peeled and coarsely grated
• 1 cup sugar
• 1 Tbsp lemon or lime juice
• 1 tsp lemon or lime zest
• ¼ tsp ground cinnamon
• 2 ½ Tbsp cornstarch
• 1 egg mixed with 2 Tbsp water, for brushing
• Turbinado or granulated sugar, for sprinkling