Preheat the oven to 350°F. Grease a 9 x 13-inch baking dish with coconut oil spray and line with parchment paper. Mix dry ingredients. In a medium, microwave-safe bowl, combine the almond butter, honey, applesauce and vanilla. Microwave for 45 seconds to 1 minute and whisk to fully incorporate. Add the warmed wet ingredients to the dry ingredients. Use a spatula to combine, then, with clean hands, knead the mixture together. Add in chocolate chips or blueberries to taste. When ingredients begin to adhere, turn the mixture into the prepared pan and press firmly with your fingertips and palms of your hands to create a firm bar and flat surface. Bake for 15-20 minutes, or until the top is a nice golden color. Remove the pan from the oven and let cool for 30 minutes before cutting into bars. Keep bars in airtight container.