In a large mixing bowl, combine rolled oats, grated carrots, Greek yogurt, and almond milk. Whisk until smooth and creamy.

Sprinkle in freshly ground cinnamon and maple syrup, mixing thoroughly to ensure all flavors integrate beautifully.

If desired, fold in chopped walnuts or pecans. Stir until nuts are evenly distributed.

Divide the oat mixture evenly into individual jars, filling about three-quarters full. Seal tightly to keep fresh.

Place jars in the refrigerator and chill for at least 4 hours, ideally overnight.

Serve chilled or at room temperature, topping with extra grated carrots, cinnamon, or nuts if desired.