Old-Fashioned Blueberry Pie

Ingredients

• 5 cups blueberries
• 3/4 cups granulated sugar
• 1/4 cup all-purpose flour
• 1/2 teaspoon grated lemon rind
• 1 tablespoon lemon juice
• 1/2 teaspoon cinnamon
• 1 egg yolk
• 2 1/2 cups all-purpose flour
• 1/2 teaspoon salt
• 1/2 cup cold butter cubed
• 1/2 cup cold lard
• 1/4 cup ice water
• 3 tablespoons sour cream