Add almond milk, banana, honey, almond butter, vanilla, egg, oats, cinnamon, baking powder, and salt to a blender.
Blend at a medium-low speed, use a spatula to scrape the edges, and continue to blend until all the ingredients are combined. **Do not over blend. You should still be able to see specs of oats**
Fold the blueberries into the batter.
Pour the batter into a greased or lined 9in by 13in baking dish. Top with extra blueberries, and bake for 40-minutes. Use the toothpick method to determine whether they're done. If you are using a different-sized baking dish, that is fine! Just pay attention to the baking time. If you're using a bigger pan, they'll be done sooner.
Let the bars cool for about 45-minutes before slicing into them.