Wash the potatoes and cook for 15-20 minutes. Quench and peel
Clean and wash the cauliflower and divide it into florets. Clean, wash and chop the carrots and spring onions. Cook cabbage and carrots in 3/8 l boiling salted water for about 10 minutes. Add spring onions and cook for 3-5 minutes. Drain the vegetables, collect the vegetable stock. Cut potatoes into quarters
Heat the fat. Sweat flour in it. Deglaze with vegetable stock and milk and bring to the boil. Stir in mustard. Grate cheese. Melt half in the sauce, season to taste
Put the vegetables and potatoes in a greased casserole dish. Pour sauce over it, sprinkle with the rest of the cheese. Bake in a hot oven (electric cooker: 200 °C / convection oven: 175 °C / gas: level 3) for approx. 25 minutes
Drink: apple juice spritzer