A quick and easy blueberry crumble dessert with a sweet and tangy filling topped with a buttery, cinnamon-spiced crumble.
1/2 c. flour
1/2 c. old fashioned rolled oats
1/2 c. white sugar
1/2 c. brown sugar
1/2 t. salt
1 t. cinnamon
1 stick butter, cut into tablespoon-sized pieces
4 - 6 c. blueberries
1/2 c. sugar
1/2 t. grated lemon zest
2 T. butter