Wash the vegetables. Cut the leek into thin rings and the zucchini into small pieces.
Heat a little olive oil in a soup pot and briefly sauté the leeks, zucchini, and garlic. Add the stock, bring to a boil, and simmer for about 10 minutes.
Remove the pan from the heat and purée the soup with a hand blender until smooth.
For a thicker soup, leave as is. For a thinner soup, add some extra stock.
Season the soup with salt and pepper. Garnish with chili flakes and cream. Bon appétit!