Inspired by DalDalGuriHaeDal..
Wash the sweet potato thoroughly, peel it, and cut it into small pieces.
Place the sweet potato in a small pot, add water, and boil.
Strain the boiled sweet potato and mash it until smooth.
Add low-sugar powdered milk and milk to the mashed sweet potato and mix well.
Transfer the mixture to a bowl and top with yellow cheddar cheese.
Heat in a double boiler or microwave until the cheese melts.
Transfer to pudding cups, let it cool, and serve.