Indian
Peel the mangoes, cut the flesh away from the stones and chop it roughly.
Put the mango, yogurt, milk, sugar and most of the cardamom into a blender.
Blend on high speed for 1 minute until completely smooth.
Taste and add a little more sugar if the mangoes are not very sweet, then blend again for a few seconds.
Add the ice cubes and blend for 20-30 seconds until the lassi is cold and frothy.
Pour into 4 tall glasses and serve at once, sprinkled with the remaining cardamom.