Ashley's blueberry oat bars

Ashley made us these delicious bars after we brought Blake home from the hospital. They are great for breakfast or a snack. The original recipe is from Real Food magazine.

Ingredients:
2 cups old fashioned oats
2 cups whole wheat flour
1/2 teaspoon salt
1 teaspoon baking powder
1 teaspoon baking soda
1 1/2 cups brown sugar
6 T butter, chilled
3/4 cup milk
Juice and zest of 1 lemon
2 teaspoons vanilla
1/2 cup sugar
1 T cornstarch
2 cups frozen blueberries

Preheat oven to 350
1. Combine oats, flour, salt, baking powder, baking soda and brown sugar. Cut butter into small pieces and add to flour/oat mixture using a pastry blender or 2 forks.
2. In a separate bowl combine milk, lemon juice and vanilla. Add to oat mixture until combined. Press 2/3 of the mixture into a 9 x 12 pan. Set aside remaining 1/3 oat mixture.
3. Combine sugar, cornstarch, lemon zest and 1 cup frozen blueberries in mini food processor. Add to remaining 1 cup blueberries and spread over oat mixture. Crumble remaining oat mixture on top of blueberries.
Bake for 50-55 minutes. These also freeze well if individually wrapped.