Blueberry Picnic Bars

Base and Topping:
1 1/2 cups oats
1/2 cup all-purpose flour
1/2 cup packed brown sugar
1/4 teaspoon baking soda
1/8 teaspoon salt
6 tablespoons butter, melted

Filling:
1 1/2 cups blueberries
3 tablespoons sugar
2 teaspoons cornstarch
1 teaspoon lemon juice

Heat oven to 350 degrees F. Lightly grease 8-inch square pan.

In large bowl, mix oats, flour, brown sugar, baking soda and salt. Add melted butter and stir with fork until evenly moistened (mixture will be crumbly.) Reserve 1/2 cup crumb for topping. Press remaining mixture evenly and firmly over bottom of pan.

Bake 12 minutes to set.

Filling: In small saucepan stir berries, sugar, cornstarch and lemon juice over medium heat until simmering, Simmer, stirring occasionally until juices are no longer cloudy. Spoon over crust. Sprinkle reserved crumbs on top and bake for 30 minutes.