For the apple chips, wash 1 apple and rub dry. Core with an apple corer and cut or slice into thin slices. Sprinkle with 3 tbsp. lemon juice. Place a piece of baking paper on the oven rack of the oven and spread the apple slices on top. Dry in the preheated oven (electric cooker: 150 °C/ circulating air: 125 °C/ gas: see manufacturer) for 30-40 minutes
Wash the pumpkin, quarter it, scrape out the seeds and fibres. Cut pumpkin into pieces. Clean, peel and chop the carrots. Wash 2 apples, quarter and remove seeds. Cut into pieces. Peel onion and garlic. Chop onion coarsely, cut garlic in half. Spread everything in a roaster. Season with sugar, salt and pepper. Cook open in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for about 1 1/4 hours. After about 30 minutes add stock to the cooking time. Finish cooking
Peel off the skin of the blood sausage, cut the sausage into slices. Heat oil in a pan. Fry the sausage for about 1 minute on each side. Take out and let drain on kitchen paper. Wash parsley and dab dry. Pluck off leaves and chop finely
Remove the roaster from the oven. Add 100 g crème fraiche. Puree everything finely, season to taste with salt, pepper and 3 tbsp. lemon juice. Pluck the black pudding into large pieces. Serve the soup with 100 g crème fraîche, apple chips, sausage, parsley and ground pepper