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How to make sweet potato mash
Peel and cut the sweet potatoes.
Use a vegetable peeler to remove the skin from the sweet potatoes, then rinse the bare sweet potatoes with running water. Cut each one into 2-inch (5-cm) chunks.
Since you'll be removing the skins from the sweet potatoes, there's no need to scrub them clean beforehand. A simple rinse after peeling the spuds should be enough to remove any residual dirt from the flesh.