Soak toast in cold water. Wash the potatoes and cook in boiling water for about 20 minutes. Squeeze bread well. Knead with minced meat and mustard. Form balls out of the minced mass. Heat the oil in a pan and fry the meatballs for about 5 minutes.
Peel and finely dice the onion. Melt fat in a pot, dust with flour and sauté briefly while stirring. Gradually add 350 ml water while stirring. Simmer for 5 minutes at low heat. Drain potatoes, rinse with cold water and peel. Cut into slices. Stir the sour cream into the sauce and let it cool down a bit. Clean and wash the broccoli and cut into florets. Clean, peel and wash the carrots. Halve lengthwise and cut into slices. Cook in boiling salted water for 6-8 minutes. Drain, rinse with cold water and let drain.
Stir the sour cream into the sauce and let it cool down a bit. Clean and wash the broccoli and cut into florets. Clean, peel and wash the carrots. Halve lengthwise and cut into slices. Cook in boiling salted water for 6-8 minutes. Drain, rinse with cold water and let drain. Wash the chervil, dab dry, put something aside for garnishing. Add the rest to the sauce, puree finely and season to taste with salt and pepper. Layer potato slices, ham, carrots, broccoli and meatballs with the sauce in an ovenproof dish. For the last layer, place the remaining potato slices in a fan shape on the casserole dish and sprinkle with cheese. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 25-30 minutes. Garnish with chervil
Wash the chervil, dab dry, put something aside for garnishing. Add the rest to the sauce, puree finely and season to taste with salt and pepper. Layer potato slices, ham, carrots, broccoli and meatballs with the sauce in an ovenproof dish. For the last layer, place the remaining potato slices in a fan shape on the casserole dish and sprinkle with cheese. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 25-30 minutes. Garnish with chervil