01 - Place strawberries, banana, Greek yogurt, milk, and sweetener (if using) in blender container.
02 - Add vanilla extract and chia or flax seeds if desired.
03 - Blend on high speed until completely smooth and creamy, stopping to scrape down sides if necessary.
04 - Test consistency and sweetness; add more honey or milk to achieve desired texture.
05 - Pour into two glasses and serve right away, garnished with fresh strawberry slice if preferred.