Clean, peel, wash and chop the parsley roots. Peel and chop the onion. Peel, quarter, core and roughly dice apples. Heat butter in a large pot. Fry the onion until transparent.
Add parsley roots and apples. Briefly sauté while stirring. Add 1 l stock, bring to the boil, cover and simmer for about 30 minutes.
For the puree, cook the red lentils in 200 ml stock for about 15 minutes until soft and then puree finely with a hand blender. Stir in 2 tablespoons of cream. Season the puree with salt, pepper and curry.
Fry bacon in a pan without fat on both sides until crispy. Drain on kitchen paper. Finely puree the parsley roots, apples and onion with a hand blender. Add 200 g cream, bring to the boil and simmer for about 2 minutes.
Season to taste with salt and pepper.
Serve the soup. Use two tablespoons of the lentil puree to cut off the cams and add to the soup. Serve with bacon and possibly pumpkin seed oil.