Soak rolls in cold water. Peel and finely dice the onions. Knead minced meat, half of the diced onions, squeezed out roll and egg. Season with salt and pepper. Form a loaf from it. Press the remaining onion cubes on the top.
Place on a greased baking tray. Bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 1 hour. Cover if necessary. In the meantime, wash and clean the mushrooms. Halve the mushrooms. Wash, quarter and seed the tomatoes. Cut the flesh into small cubes. Wash thyme, remove leaves from the stalks and chop. Heat the fat. Fry the mushrooms on a high heat for about 3 minutes. Season with salt and pepper.
Cut the flesh into small cubes. Wash thyme, remove leaves from the stalks and chop. Heat the fat. Fry the mushrooms on a high heat for about 3 minutes. Season with salt and pepper. Deglaze with cream and vegetable stock and cook for another 2 minutes. Add sauce thickener. Season with salt, pepper and thyme. Add tomato cubes. Cut the roast open and arrange with the mushroom vegetables. Serve garnished with fresh herbs and tomato rose
Deglaze with cream and vegetable stock and cook for another 2 minutes. Add sauce thickener. Season with salt, pepper and thyme. Add tomato cubes. Cut the roast open and arrange with the mushroom vegetables. Serve garnished with fresh herbs and tomato rose