Peel the potatoes and asparagus. Finely dice the potatoes, cook in the stock and remove from the stock. Cook the asparagus in the broth and remove it. The broth is still needed.
Melt the butter, stir in the flour and pour in the cream, stirring well. Then add the broth and cook for about 10 minutes.
Cut the ham into strips, add to the sauce with the peas, potatoes and asparagus. Season with salt, pepper and a little nutmeg.