I have got a couple on my blog, but here is my personal favourite:
1 avocado, peeled and chunked
1 lime, peeled and halved
1 cucumber (add more or less to change consistency), roughly choped
Tofu 1/2 to 1 cube (silken or soft)
Soy milk - try to find unsweetend (again add to taste/desired consistency)
1-2 big handfuls of fresh raw spinach leaves
Ice to taste (if your blender can handle ice)
Peel the avocado and lime and thoroughly wash the cucumber (if it is a thick skinned cucumber, peel some of this away). Then place all of the ingredients into a blender and whizz it all up. If you are particularly keen on lime then you can garnish with some of the zest! This recipe, in my opinion works best with limes, but if you are keen on lemons that try that too (or a combo of both!).
I love this - especially after the gym...