Clean or peel and wash the vegetables. Peas peel. Cut carrots into slices, cut beans and sugar snap peas in half. Cut cauliflower into small florets. Roughly chop the spinach. Peel, wash and chop the potatoes
Bring a good 1 1/2 l salted water to the boil. Cover and cook potatoes, carrots, cauliflower and beans for about 15 minutes. Stir 5-6 tbsp. milk and flour until smooth. Pour the rest of the milk into the vegetables and bring to the boil. Bind with the flour. Add peas, mangetout and spinach. Cover and cook for another 5-10 minutes.
Heat the prawns in the soup briefly. Season everything with salt, pepper and sugar. Add butter in flakes. Wash parsley, chop coarsely and sprinkle over it