Subtle enough to hide behind whatever fruit you use and creamier than spinach, zucchini makes a great base for a sneaky veggie smoothie. Stick to the summer months for this one, when your gut can better handle raw vegetables. I used to have this recipe on the website using raw zucchini and raw mango, but after working with an Ayurvedic doctor I no longer mix fruit and vegetables in one meal (it's not great for digestion), so the workaround is to use dried mango instead.
In keeping with the tropical taste of mango, I use coconut yoghurt here, but feel free to substitute for dairy yoghurt or your favourite non-dairy alternative. This can be turned into a more drinkable/less spoonable smoothie by using coconut milk instead of yoghurt.