In a bowl mix your freshly rinsed blueberries with the zested lemon, lemon juice, white sugar and vanilla extract.....When you zest your lemon make sure you stop at the white of the lemon, DO NOT ZEST THE WHITE PART OF YOUR LEMON, you only want the yellow part (thats where all the good flavor is at !!!)......
Mix all very well and set to the side.....
Next spray a 9X13 inch glass baking pan with butter cooking spray......
Take your lemon cake mix and pour dry cake mix into your greased baking pan, making sure dry cake mix is evenly spread out.....
Next drizzle your melted margarine OR butter over all.......If it looks a bit too dry melt more butter or margarine and add on top......
Now place your blueberry mixture over cake mix.....Cover as much of the cake mix as possible with your blueberry mixture.....
Sprinkle blueberries with your cinnamon powder......
Bake in a preheated 350 degree oven for 30 minutes....
Let sit for about 30 minutes then serve with ice cream or by itself and enjoy !!!!
