Clean and wash the cauliflower and cut off the florets. Clean and wash the beans and break through 1 x in the middle. Peas peel. Peel, wash and slice carrots. Wash potatoes thoroughly and brush if necessary.
Put the beans into 1 litre of boiling salted water and cook for about 20 minutes. After about 10 minutes add carrots, bring to the boil again. Add the cauliflower 8 minutes before the end of the cooking time. Add the peas 3 minutes before the end of the cooking time.
Meanwhile, cook the potatoes in boiling salted water for about 20 minutes. Wash parsley, shake dry and chop finely. Pour the vegetables into a sieve, collecting the vegetable water. Measure 500 ml vegetable water.
Melt the fat in a saucepan, dust with flour, sauté while stirring and gradually deglaze with measured vegetable water and cream. While stirring. Season vigorously with salt, pepper, stock and nutmeg.
Add vegetables and parsley, heat up again. Drain the potatoes. Arrange potatoes, vegetables and ham on plates.