Peel, wash and halve the potatoes. Cook in salt water for about 20 minutes. Clean or peel and wash the vegetables. Cut cabbage into florets, carrots into pieces. Cook vegetables in 1/2 l boiling salted water for about 10 minutes. Drain, catch the vegetable water
Grate cheese. Peel and finely chop the onion. Fry in hot fat. Dust with flour and sweat briefly. Stir in vegetable water and milk. Melt half the cheese in it. Season to taste with salt, pepper and nutmeg. Whisk eggs, stir into the sauce
Pour the vegetables into a lightly greased casserole dish. Spread the sauce, remaining cheese and seeds over it. Bake in a hot oven (electric cooker: 200 °C/circulating air 175 °C/gas: level 3) for approx. 20 minutes. Garnish with herbs if necessary