Wash and clean the zucchini and cut into small cubes. Wash spring onions and cut into fine rings. Peel garlic and press it through a garlic press. Cut out 4 circles (4 cm Ø) from each toast slice.
Finely grate the cheese. Heat oil in a pot. Sauté the zucchini, spring onions and garlic. Deglaze with broth, add bay leaf, bring to the boil. Let simmer for about 5 minutes. Line baking tray with baking paper.
Place toast circles on top and sprinkle with cheese. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 5 minutes. Remove the laurel from the soup. Season soup with salt and pepper and serve.
Add 3 cheese croutons to each soup.