Blueberry Squares

Method

1. Preheat oven to 350 degrees.
2. In a medium bowl, combine flour, oats, cinnamon, sugar, and butter until crumbly.
3. Press 1/2 of the flour and oat mixture into a 9 inch square pan.
4. Toss the blueberries with the lemon zest and cover the bottom of the pan.
5. Mix together cornstarch and sugar in a microwave safe bowl, gradually stir in water and heat until just boiling.
6. Pour water/cornstarch/sugar mixture over the blueberries.
7. Pour the rest of the flour/oat mixture over the top.
8. Cook for 45 minutes-1 hour.