Prepare ingredients: wash spinach, peel avocado, slice cucumber, and measure kefir. If using frozen fruit (pineapple or banana), have it ready.
Add in this order to a high-powered blender (I used my Vitamix): kefir, avocado, spinach, banana or frozen fruit, quinoa (if using), lime juice, any boosters (chia, protein powder), then ice.
Blend until smooth and creamy.
Taste and adjust: add a touch of honey if you want it sweeter, or more lime for brightness. If it’s too thick, add water or more kefir.
Pour and serve immediately. Enjoy!