What most naturally follows?

How to make healthy marshmallow sweet potatoes
Peel sweet potatoes, for instance with a potato peeler or knife.
A small sharp non-serrated knife, preferably without a pointy point (to protect the user), is a good option. The skin is thin and the potatoes are hard, so take a narrow strip at a time to avoid jamming the knife and also to avoid wasting potato.
Sweet potatoes are not very easy to peel safely so generally don't let a child do this. Chop the sweet potatoes into disks about an inch thick.