Creating Apple Cinnamon Overnight Oats is a simple and straightforward process. Follow these steps to make your perfect breakfast:

1. Prepare the Mixing Bowl: Take a medium-sized mixing bowl and add the old-fashioned rolled oats.
2. Add Liquids: Pour in the milk and Greek yogurt, stirring well to ensure the oats are fully submerged and will soak up the flavors overnight.
3. Spice It Up: Add the ground cinnamon, a drizzle of maple syrup or honey, chia seeds, and vanilla extract to the mixture. Stir thoroughly to combine all ingredients.
4. Incorporate Apples: Fold in the finely chopped apple pieces, ensuring they are evenly distributed throughout the mixture for bursts of freshness in every bite.
5. Season: Add a pinch of salt to balance the sweetness and enhance the flavors of the oats and apples.
6. Refrigerate: Transfer the mixture into a jar or airtight container, cover it tightly, and refrigerate overnight (or for at least 4 hours).
7. Top and Serve: Before serving, sprinkle chopped walnuts on top for added crunch and flavor. You can also add a dash more cinnamon for garnish if desired.