For the avocado cream, cut avocado in half. Scoop out the flesh and mash finely with a fork. Sprinkle with the juice of one lemon.
Wash the herbs, spin dry and chop finely. Finely grate the celery and add half of it to the avocado. Stir all the ingredients into the cream except for a little chives and the remaining celery.
Sprinkle the remaining celery with a little lemon juice and sprinkle over the avocado cream with the chives.
Prepare the avocado cream as fresh as possible, as it discolors quickly.