For the yellow zucchini soup, wash the zucchini well and cut into slices. Heat some butter in a saucepan and sauté the zucchini in it. Deglaze with chicken stock and simmer for 5 minutes. Add whipping cream, bring to a boil and season with salt, pepper and coriander.
Puree with a hand blender and strain through a fine sieve. Before serving, quickly blend again and pour into a hot rinsed plate or soup cup.