Blueberry Crumble Pie

Ingredients

• 1 sheet refrigerated pie crust
• 6 cups fresh or frozen wild blueberries
• 3/4 cup sugar
• 3 tablespoons all-purpose flour
• 1/8 teaspoon ground cinnamon
• 1 teaspoon minced fresh thyme, optional
• 1/2 teaspoon grated lemon zest, optional
• 1 tablespoon butter, cubed
• TOPPING:
• 12 shortbread cookies
• 3 tablespoons quick-cooking oats
• 3 tablespoons brown sugar
• 3 tablespoons butter, cubed
• 2 tablespoons all-purpose flour
• 1/4 teaspoon ground cinnamon
• Dash salt
• Whipped cream