Preheat oven to 375 degrees F (190 degrees C).
Grease a 9x13-inch baking dish.
Combine flour, oats, 1 cup sugar, cinnamon, and
baking soda in a large bowl. Cut butter into
flour mixture until it resembles coarse crumbs.
Reserve about 2 cups flour-butter mixture.
Press remaining mixture into the prepared
baking dish to form a crust.
Bring blueberries, remaining 1/2 cup sugar,
cornstarch, and lemon juice to a boil in a
saucepan, stirring constantly, until mixture is
thickened, about 2 minutes. Spread blueberry
mixture over crust and sprinkle with reserved
oat mixture.
Bring blueberries, remaining 1/2 cup sugar,
cornstarch, and lemon juice to a boil in a
saucepan, stirring constantly, until mixture is
thickened, about 2 minutes. Spread blueberry
mixture over crust and sprinkle with reserved
oat mixture.
Originally Submitted
7/4/2019
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