Peel, wash and chop the potatoes and carrots. Cook in salted water for about 20 minutes
Wash liver and pat dry (defrost frozen liver). If necessary, cut thick pieces flatter. Turn liver in flour, tap off excess. Clean and wash spring onions and cut into rings
Wash the thyme, pluck it. Wash apples and remove seeds, for example with an apple corer. Cut into rings or slices. Sprinkle with lemon juice
Heat 1 tablespoon of oil. Fry the liver for 2-3 minutes on each side, season with salt and pepper. Heat 1 tablespoon of oil. Steam spring onions and apples for 2-3 minutes on both sides. Add thyme, season to taste
Drain the potatoes and carrots and press or mash them with a potato ricer. Season to taste with salt, pepper and nutmeg. Serve with liver and thyme apples