1. 1. Combine Dry Ingredients: In a small jar or container with a lid (a 12-16 oz mason jar works perfectly), add the rolled oats, chia seeds, ground cinnamon, and a tiny pinch of salt. Give these a quick stir with a spoon to ensure they are well combined.

2. 2. Add Wet Ingredients: Pour in the milk, unsweetened applesauce, and maple syrup (if using). The liquids should just cover the dry ingredients.

3. 3. Stir Thoroughly: Use your spoon to stir everything together very well. Make sure there are no clumps of oats or chia seeds stuck at the bottom. This initial stir is crucial for even hydration.

4. 4. Fold in Diced Apple: Gently fold in the finely diced fresh apple pieces. Distribute them evenly throughout the mixture.

5. 5. Seal and Chill: Place the lid tightly on your jar or container. Transfer it to the refrigerator and let it chill for at least 4 hours, but ideally overnight (8 hours or more). This allows the oats and chia seeds to fully absorb the liquid and soften.

6. 6. Check Consistency and Serve: In the morning, open the jar. The oats should be thick and creamy. If they seem too thick, you can add a splash more milk and stir until you reach your desired consistency. Serve cold directly from the jar.