Using a saucepan, cook filling ingredients over low heat, stirring constantly, until thickened, about 10 minutes. Let cool 5 minutes.

Heat oven to 400°F. Spray a 9x13 baking dish with non-stick cooking spray; set aside until ready to use.

In large bowl or stand mixer, stir brown sugar and butter until well combined.

Add flour, oats, baking soda and salt and mix until crumbly. Press half of the oat mixture into the bottom of the pan. Spread with filling. Top with remaining oat mixture. Press oat mixture lightly into filling.

Bake 25 to 30 minutes or until light brown.

Cool 5 minutes before cutting into squares.

Serve warm and enjoy!