Dump everything into your blender, and either choose the smoothie function, or blend on full power for 50 seconds, and serve immediately.
This mango and lime lassi can be kept in an airtight jar or bottle in the fridge for a couple of days.
If you roll the limes between your palm and a hard surface for around 30 seconds before cutting into them, it makes them give up their juice more readily. You'll know you've rolled them enough when you can feel that the fruits are much softer. Depending on the firmness and ripeness of your limes, you may have to press down quite firmly when rolling.
Nutritional information does not include any sugar or sweetener, as I have no way of knowing which, and how much you may use.