I took pictures as proof do you would know I wasn't fibbing.
Ingredients: blueberries, banana, strawberries (frozen), 2 spoons of Greek yogurt, three lettuce leaves, the juice from 1/2 a lemon. And added later because the blender wasn't blending a quick splash of cranberry juice.
Instead of lettuce I should probably use something cool like kale but this is what I had :-).
Also given the resulting non greenness of the smoothie I'm guessing it's supposed to be more greens and less fruits. Baby steps people baby steps.
I cannot taste the lettuce but I can feel it which takes a few sips to get used to.