Spoon in ½ c plain (or flavored) Greek yogurt, ¾ c old fashioned oats, 1 T peanut butter, 1 teaspoon chia seeds, ½ teaspoon vanilla extract, ½ teaspoon cinnamon, and your chopped granny smith apple. Of course, just use your favorite apple. Pour 1 c milk over oatmeal, at least cover oats. Refrigerate for up to 5 days.