1. Pre-heat oven to 300 degrees F and cover an 8 x 8 inch baking pan with parchment paper. Cut two sheets of parchment paper and crisscross them in the pan so that you can lift the bars out once they have cooled.
2. In a medium sized bowl, mix together all crust ingredients. Press the dough into the bottom of the baking pan in an even layer. Use a fork to press holes into the dough so that the air can escape. Bake until center is firm and edges are just beginning to brown.
3. While the crust is baking, you can mix up the blueberry layer. Add blueberries to a medium sized sauce pan and cook over Medium Low heat until liquid is released, stirring frequently. Bring liquid to a boil and stir in 3 tablespoons sweetener.