01 - Place the chopped apple, banana, and spinach into a blender container.
02 - Pour in the lemon juice, water or almond milk, and any optional add-ins you prefer.
03 - Blend on high speed until completely smooth and creamy, approximately 30-60 seconds.
04 - Taste the smoothie and add additional sweetener if needed.
05 - Pour into glasses, add ice cubes if desired, and serve immediately.