Preheat the oven to 180 °C.
Put Fleckerln in plenty of boiling salted water and cook until crisp (6-8 minutes), strain, drain.
In the meantime, cream butter, gradually add yolks, season with salt, pepper and nutmeg.
Cut ham into cubes (about 1/2 cm), add to butter-yolk mixture with drained Fleckerln.
Mix in sour cream.
Beat egg whites until stiff, fold into pasta.
Butter a baking dish and sprinkle with breadcrumbs.
Pour pasta into the dish, smooth out and bake in the oven for about 45 minutes (the surface should be crispy-brown).
Divide baked ham fritters into portions and serve with green salad.