Clean and rinse the cauliflower and broccoli and cut into small roses. Boil half of the clear soup in each of two small saucepans. Cook the cauliflower florets for 8 min, the broccoli florets for just 4 min, with the lid on, until just cooked. Drain into a colander over a baking dish. Blend the drained clear soup with the yogurt and whipped cream, season with salt, pepper, nutmeg and re-seasoning. Arrange the cauliflower and broccoli florets decoratively on serving plates, drizzle the whipped cream over them. Serve immediately with a small piece of baguette.
Tip: The higher the fat content of the yogurt, the more aromatic and creamy the result!