Place banana, nut butter, and almond milk in a glass jar (or container with a lid) and stir with a spoon to combine. Add oats, vanilla, and cinnamon and stir, then press down with a spoon to ensure all oats are coated in oat milk. Cover securely with a lid or plastic wrap and set in the refrigerator overnight (or at least 5 hours).
The next day, open and enjoy as is, or garnish with desired toppings.
Serving size: 1 serving Calories: 435 calories, Fat: 23 grams, Saturated fat: 5.5 grams, Carbohydrates: 47.5 grams, Sugar: 12.5 grams, Sodium: 190 milligrams, Fiber: 10 grams, Protein: 15 grams, Cholesterol: 0 milligrams.