01 - Add the chopped apple, rolled oats, almond milk, Greek yogurt, maple syrup, cinnamon, nutmeg, vanilla extract, and salt to a high-speed blender.
02 - Add chia or flaxseeds and ice cubes, if using.
03 - Blend on high until completely smooth and creamy, about 1 minute.
04 - Taste and adjust sweetness or spice as desired.
05 - Pour into glasses and serve immediately.