In a blender, add 1 cup soy milk, 1 sliced frozen banana and 1/4 cup frozen blueberries.
Add 1/4 cup oats and 1 tablespoon chia seeds.
Add 1 teaspoon vanilla extract and blend the ingredients well.
Although the fruits are naturally sweet, you can also add white sugar to make the smoothie sweeter.
Check the consistency and add more milk if you feel it is too thick. Pour into glass and enjoy!