Hi Cendrine,
I love your name!
Google `green lemonade` for a recipe. We drink it pretty much every day in our house (guests love it too). It has a base of lettuce, carrots, apples, celery and a lemon but I add kale, a beet, a raw sweet potato and lots of other things - the taste doesn`t seem to change much from the lemonade flavour. It`s great. You could add vodka it`s that good!
enjoy.