They are balls of mashed potato egged on top and baked.

Boil 4 potatoes, drain off and mash them with the raw yolk of an egg, pinch of salt and slight grating of nutmeg. Make in round balls about the size of walnuts, place in a baking pan, egg over the tops and a few minutes before dinner put them in the oven to bake a light brown. Serve one or two with fish or use to garnish entrees.