Combine oats, milk, mashed banana, maple syrup, vanilla, cinnamon, and salt in a mason jar. Mix well.
Cover oats and refrigerate overnight or for at least four hours.
To serve, top oats with sliced banana and walnuts. Enjoy!
Notes
To make this recipe vegan, simply use your favorite plant based milk, such as almond, coconut, or soy.Make sure to read all the info before this recipe card for more tips, variations, and related recipes!