Add the apples, cinnamon, maple syrup and a pinch of sea salt to a small sauce pan over low heat. Mix to combine then cover and cook for about 10 minutes, stirring occasionally, until the apples are tender.
Remove the lid, increase the heat to medium and cook an additional 2 to 3 minutes or until the sauce thickens slightly and coats the apples and excess liquid evaporates. Remove from the heat and set aside while you make the oats.
In a small bowl, add the milk, chia seeds, vanilla, cinnamon, nutmeg, and maple syrup. Add the oats and mix to combine.
Add 1/4 of the oat mixture to 2 mason jars (8oz) or airtight containers (with lids). Layer each evenly with ΒΌ of the apples then top each with an equal amount of the remaining oats and 1 tablespoon walnuts.
Cover and refrigerate overnight. Oats may be eaten cold, at room temperature or warm.
