In a mixing bowl, combine oats, chia seeds, cinnamon, nutmeg, and salt.
Add almond milk, yogurt, maple syrup, vanilla extract, and stir to integrate.
Fold in chopped apples until evenly distributed.
Transfer to jars or airtight containers and refrigerate for at least 6 hours or overnight.
In the morning, stir well, add desired toppings, and serve cold or gently warmed.