1Put all of the ingredients, except the avocados, in the jug of a blender.
2Halve the avocados lengthways. Scoop out the top third of the four avocado halves and add it to the blender jug. Blitz to a smooth spread.
3Spoon the dip back into the avocado shells and serve immediately.
4To keep the avocados from going brown if you want to store them in the fridge, coat the exposed surfaces with lemon juice and cover with cling film.