1 Put ham in a shallow baking dish and bake in preheated oven at 180°C (fan 160°C, gas: mark 2-3) (approximately 350°F) for about 45 minutes.
2 Meanwhile, rinse and drain green beans, then cut into pieces.
3 Melt the butter for the sauce in a small pot, sprinkle in flour and cook until golden brown while whisking.
4 Pour in milk and broth and slowly bring to a boil, stirring constantly. Cover and cook sauce over low for about 5 minutes, stirring occasionally.
5 Boil 250 ml (approximately 1 cup) of water in a pot and add salt. Cook greens beans over medium heat, covered, for about 8 minutes.
6 Rinse the parsley, shake dry and pluck the leaves. Set some aside for garnish and finely chop the rest.
7 Drain beans, add to the sauce and bring to the boil.
8 Season green beans with salt, pepper and freshly grated nutmeg. Stir in chopped parsley.
9 Take ham out of the oven, cut into slices, garnish with parsley and serve with the beans.