1) Put the yogurt, cashews, flax, avocado, and the minimum amount of juice in a blender and blend until smooth. It will probably take a minute or two to blend the nuts. Add the frozen fruit slowly and add additional juice if needed. You will probably need to stop the machine a couple times to scrape down the sides. Blend in the agave if desired. Pour and serve.
Source of recipe: I am trying to lose weight, but obviously my slender preschooler is not. She wants to eat what I eat and has recently decided she doesn't want to eat nuts/avocados with her meals. She loves smoothies, so I threw this together to sneak some healthy fats into her. There is a yogurt flavor, so I wouldn't try this with kids that won't eat yogurt.