In a mixing bowl or mason jar, combine rolled oats, chia seeds, ground cinnamon, ground nutmeg, and salt. Stir well.

Add milk, Greek yogurt, and maple syrup or honey to the dry mixture. Mix until smooth and creamy.

Gently fold in grated carrots and crushed pineapple until evenly distributed.

Cover and refrigerate for at least 6 hours or overnight to let the oats absorb the liquid.

Stir the oats before serving, adding more milk if too thick. Adjust flavors if necessary.

Serve in bowls, topped with chopped walnuts or pecans, raisins, or freshly grated carrot.