Wash the zucchini, chop them. Peel and chop onion. Heat 1 tablespoon of oil in a saucepan. Fry the zucchini and onion. Add stock and simmer covered for about 5 minutes.
Peel the garlic and cut into thin slices. Heat 1 tablespoon of oil in a frying pan. Fry the bread and garlic in it.
Mash the zucchini in the stock. Add cream and bring to the boil. Season with salt, pepper and lemon juice. Serve soup with bread. Sprinkle with cress.