Peel, wash and cut carrots and kohlrabi into small pieces. Cook in 1/2 litre salt water for about 12 minutes. Add 1/2 cup of cream, bring to the boil briefly. Stir the rest of the cream and flour until smooth and stir into the vegetables.
Bring to the boil again. Add peas and season with salt and pepper. Press the sausage out of the skin and fry in hot oil for about 3 minutes, turning. Fill into an ovenproof dish with the vegetables in the sauce.
Grate cheese over it. Sprinkle with breadcrumbs. Cook in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 20 minutes. Sprinkle with chopped parsley and serve garnished.