01 - Place spinach, chopped apple, banana, almond milk, and lemon juice into blender container.
02 - Sprinkle in chia seeds, sweetener if desired, and ice cubes.
03 - Process on high speed until completely smooth, approximately 1 minute.
04 - Test consistency and sweetness; add more sweetener or liquid as needed.
05 - Divide between glasses and enjoy while fresh.