Wash the sweet potatoes, cut them in half, boil until tender, peel, and mash with a fork while hot.

Peel and finely chop the onion and carrot. Blanch the ham in boiling water and chop finely. Also chop the slice of cheese into small pieces.

Mix the mashed sweet potatoes with the chopped onion, carrot, ham, cheese, salt, and pepper. Shape the mixture into small round balls.

Coat each ball in flour, then dip in beaten egg, and finally coat with breadcrumbs.