Peel and chop the onion. Peel and chop the garlic. Peel, clean and cut carrots into large pieces. Peel, wash and roughly dice the potatoes
Heat oil in a pot, add onions, garlic, potatoes and carrots, fry while turning, sprinkle with 1 teaspoon sugar, caramelise slightly. Season with salt, pepper and paprika. Deglaze with stock, bring to the boil and cook covered for about 25 minutes
In the meantime, dice bread. Melt butter in a pan, add bread cubes and sunflower seeds and roast while turning. Remove from the pan. Wash, halve, clean, core and finely dice the apples. Peel horseradish and grate finely. Mix horseradish and crème légère. Season with salt and pepper. Mix apples, except for some garnish, into the cream, season with salt, pepper and 1 pinch of sugar.
Remove the carrots from the heat and puree them finely, season to taste with salt and pepper. Serve the soup, garnish with some apple and horseradish cream, sprinkle with croutons and apples. Add the remaining apple and horseradish cream