Preheat oven to 375 degrees
In a small bowl add graham cracker crumbs, cinnamon and melted butter. Using a fork mix until combined.
Divide the crumb mixture in four 5 inch mini pie tins. Gentle press.
In a medium bowl add blueberries, 1 tablespoon lemon juice, sugar and cornstarch. Mix until blueberries are coated.
Divide the blueberry mixture into the pie tins.
Divide the crumb topping over the blueberries.
Place pie tins on a baking sheet. Bake for 35 minutes or until brown and bubbly.
Let cool 10 minutes. Serve with a scoop of vanilla ice cream or whipped cream if desired.