Peel and chop your apples into small pieces. Using ripe, sweet apples works best, as more acidic apples may taste too sharp.
Heat maple syrup in a pan, add apples and cinnamon. Simmer for 7 minutes until tender and caramelized, adding a splash of water if needed.
In a glass bowl, combine rolled oats, protein powder, chia seeds, and apple pie spice. Stir in almond milk until fully mixed.
In a glass jar, layer half the oat mixture, then the cooked apples, and top with the remaining oats. Store in the fridge overnight or at least 8 hours.
Stir the oats before eating and add fresh apple slices on top for extra flavor and visual appeal.