Preheat oven to 350 degrees. Stir together oats, almonds, blueberries, flax seeds, brown sugar, salt, and cinnamon in a large bowl. Add milk, egg, and vanilla then stir to combine. Pour mixture into a nonstick-sprayed 8x8 baking dish then bake for 25-30 minutes, or until toothpick inserted into the center comes our clean. Cool completely then cut into bars/triangles and store in the refrigerator for 2-3 days, or individually wrap in saran wrap and freeze. Microwave to reheat.