Peel and chop the beetroot (it is best to put on disposable gloves, as beetroot stains). Peel and chop onion and apples.
Heat the fat in a pot and fry the onion in it. Fry the apples and beetroot briefly. Season with salt, pepper and some sugar. 1⁄2 Pour on l water and lilac berry juice, stir in broth.
Bring everything to the boil. Simmer covered for 20-30 minutes.
Wash the cress and cut from the bed. Puree the soup finely with a hand blender. Season to taste with salt, pepper and a little sugar. Arrange in plates. Stir the double cream until smooth and stir into the soup in streaks.
Drizzle with oil. Sprinkle with cress and coarse pepper. Ciabatta tastes good with it.