Almost Starbucks' Blueberry Oat Bars

I loooove the blueberry oat bars that Starbucks' sometimes has. So I thought I would try googling "Starbucks blueberry oatbar recipe" to see what would happen. To my luck I was able to find a similar one. It is so delicious -maybe even better and super easy.

1 3/4 cup Quaker Oats, uncooked (quick or old-fashioned)
1-1/2 cup all-purpose flour
3/4 cup brown sugar, firmly packed
1/2 cup chopped nuts (I used sliced almonds)
1/2 teaspoon baking soda
1/2 teaspoon salt
3/4 cup butter; melted
2 cups fresh or frozen blueberries
1/2 cup granulated sugar
3 tablespoons water
2 tablespoons cornstarch
2 teaspoons lemon juice

Directions

Heat oven to 350 F.
Grease 11x7-inch baking pan
Combine oats, flour, brown sugar, nuts, baking soda and salt
Add butter, mixing until crumbly.
Reserve 3/4 cup mixture; press remaining mixture onto bottom of prepared dish.
Bake 10 minutes.
Meanwhile, combine blueberries, granulated sugar and 2 tablespoons water in medium saucepan.
Bring to a boil, simmer 2 minutes, uncovered, stirring occasionally. Combine remaining 1 tablespoon water, cornstarch, and lemon juice; mix well. Gradually stir into blueberry mixture; cook and stir about 30 seconds or until thickened.
Spread over partially baked base to within 1/4 inch of edge; sprinkle with reserved oat mixture. Press topping down into blueberries slightly.
Bake 18 to 20 minutes or until topping is golden brown.
Cool on wire rack; cut into bars. Store tightly covered.