Begin by dicing your medium apple into small pieces and placing them in a small bowl. Sprinkle the apple with ground cinnamon, nutmeg, and a pinch of salt. Microwave the mixture for about 2 minutes until the apples become tender and aromatic, stirring halfway through to ensure even cooking.

In a medium bowl, combine the softened apple mixture with old-fashioned oats, maple syrup, and vanilla extract. Pour in your choice of non-dairy milk and add chia seeds if desired. Stir everything together until well blended and all the oats are evenly coated.

Transfer the oat mixture into individual jars or a large container, making sure it is tightly sealed. Place the jars in the refrigerator and let them chill for at least 4 hours, ideally overnight.

When morning arrives, give the oats a quick stir to redistribute the flavors. Serve your Cinnamon Apple Overnight Oats cold or heat them in the microwave for 30-45 seconds if you prefer a warm breakfast.