Place the apple, maple syrup, water, vanilla, cinnamon, nutmeg, salt, and cloves to a small pot over medium heat. Cook for 4-5 minutes, until softened, then set aside.
Line up 4, 8-ounce mason jars, then spoon the apple mixture into the bottom of the jars.
Pour 1/2 cup oats, 1 teaspoon chia seeds, and 1/2 cup milk into each jar. Place the lids on the jars, then shake them up to distribute the chia seeds.
Refrigerate overnight, then enjoy! Oats will keep for up to 5 days in the refrigerator.