Cut the avocado in half and remove the seed.

Spoon the pulp into a bowl and squeeze the juice of one lime immediately over the avocado to prevent it from browning. Add the salt and sugar to the bowl and the goat's cheese.

Mash the dip with a potato masher to make a smooth paste.

Then add the sour cream, stirring with a spoon. Serve with the avocado dip and garnish with coriander and lime slices.