Peel and chop the potatoes and celery and cook with lemon in 3/4 litre boiling salted water for about 20 minutes. Quarter apple, remove core. Dice the fruit flesh. Peel onion and cut into slices.
Heat 1 tablespoon of oil in a pot. Sauté the onion in it. Add apple, deglaze with apple juice and stew for about 5 minutes. Season with salt, pepper, sugar and vinegar
Cut the celery into thin slices. Drain the vegetables and collect some liquid. Remove lemon. Bring milk to the boil, melt fat in it. Mash the vegetables with a potato masher. Add milk, stir until smooth. If necessary add some vegetable water.
Season with salt and nutmeg. Fold in the celery and heat it up. In the meantime wash the chops, dab dry and season. Heat the rest of the oil in a pan. Fry the chops on both sides for about 10 minutes. Serve the puree with chops and apple-onion-vegetables. Sprinkle with pink berries and serve garnished with marjoram