Peel and chop the onion. Heat the oil in a pot. Fry the onion in it. Add tomatoes, chop coarsely. Add stock and tomato paste and season with salt and pepper.
Bring to the boil and simmer in an open pot for 10-15 minutes. In the meantime clean and wash the chicory and cut the stalk into wedges. Wrap each chicory in a slice of cheese and ham and pin it with a wooden skewer. Heat 20 g fat in a pan. Sauté the chicory well all around, place in an ovenproof dish and pour the tomato sauce over it. Braise in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-45 minutes. In the meantime, peel and wash the potatoes and cook them in boiling salted water for about 20 minutes. Warm up the milk. Drain potatoes, add 20 g fat and milk and mash coarsely.
Sauté the chicory well all around, place in an ovenproof dish and pour the tomato sauce over it. Braise in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 40-45 minutes. In the meantime, peel and wash the potatoes and cook them in boiling salted water for about 20 minutes. Warm up the milk. Drain potatoes, add 20 g fat and milk and mash coarsely. Season the puree with salt and nutmeg and serve with the braised chicory