Peel and wash the carrots and peel long thin strips with a peeler. Clean, wash and cut the leek into long thin strips. Peel, wash and cut celery into fine sticks
Cook the pasta in plenty of boiling salted water for about 10 minutes. Add the vegetables after about 4 minutes, bring to the boil again and finish cooking
Heat the fat in a saucepan. Dust with flour and sauté briefly while stirring. Stir in milk, 1/4 l water and stock. Simmer for 5 minutes
Grate cheese. Stir into the sauce and melt in it. Season to taste with salt, pepper and nutmeg. Wash and chop the parsley and stir in. Drain the pasta and vegetables, drain briefly and mix with the cheese sauce
Drink: cool juice spritzer