Fry the potato pieces with oil. Make sure not too brown, so the potato will be easy to mash.
Mash the potatoes with a fork, mix with the corned beef / minced beef, green onions, nutmeg powder, pepper, salt and cornstarch. Stir well.
Put the fried shallots in, mix well.
Round the perkedel dough, then press a little on the top so it's shaped like in the photo. Before frying, put it in the refrigerator for 20-30 minutes.
Remove from refrigerator, coat the perkedel with beaten egg, then fry with oil until lightly browned.
Serve the perkedel with warm rice and cayenne pepper or chili sauce.