Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make healthy marshmallow sweet potatoes [title] Peel sweet potatoes, for instance with a potato peeler or knife. [step] 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.

Ending1: [title] Cut sweet potatoes into strips or pieces. [step] Firm cut the extra sweet potatoes into small chunks. Ending2: [title] Peel the bottom layer of the sweet potatoes. [step] At the bottom of the sweet potatoes are 2 or 3 colored pieces of tough vegetable. Ending3: [title] Get out one small peeler or knife and grate a small stick of butter into the potato. [step] Add a pinch of salt to taste for flavor. Ending4: Sweet potatoes are not very easy to peel safely so generally don't let a child do this. [title] Chop the sweet potatoes into disks about an inch thick.

Answer format: ending1/ending2/ending3/ending4