Wash the potatoes and cook in boiling water for about 15 minutes. In the meantime, wash the kale, pluck it from the panicles and let it drain. Then blanch in boiling salted water for about 3 minutes, remove, rinse in cold water and drain.
Clean, peel and slice the carrots. Drain the potatoes, rinse and peel. Peel onion and chop finely. Heat the oil in a pan and fry the potatoes for about 5 minutes until golden brown all around.
Season with salt and pepper. Take out and put aside. Sweat onion and ham cubes in the frying fat. Add kale, carrots and stock. Steam covered for about 10 minutes. Season with salt, pepper and nutmeg.
Add the potatoes to the pan and steam for another 5 minutes. Put a dash of crème fraîche on the vegetables and serve.