Clean and wash the Brussels sprouts and cook in boiling salted water for about 10 minutes. Peel, wash and chop the potatoes and carrots. Peel onion and cut into sticks. Fry potatoes in hot oil for about 5 minutes. Drain sprouts and let them drain well. Add carrots, onion sticks and Brussels sprouts to the potatoes and fry briefly.
Add stock and cream. Cook vegetables for about 10 minutes. Grate cheese roughly and stir into the sauce. Season with salt, pepper and nutmeg. Wash the chives, dab dry and cut into small rolls. Sprinkle over the vegetable pan