Braise the onion and celery cubes in 3 tablespoons of olive oil. Pour in the broth and cook for 10 minutes over medium heat. 2/3 of the white bread coarsely, 1/3 finely dice. Add the coarse bread cubes to the soup and cook for another 10 minutes. Stir in 4 tablespoons of the parmesan and let the soup cool down a little. Pluck parsley leaves and celery leaves, wash and chop. Puree the soup and season with salt, pepper and nutmeg. Set aside 3/4 of the soup. Puree the rest with the herbs. Bring the light soup to the boil with 200 g of whipped cream. Toast the small bread cubes in 5 tablespoons of olive oil. Divide the light soup on plates and put some of the green soup in the middle.
Garnish with the bread cubes and 2 tablespoons of parmesan.