Place all of the sliced sweet potatoes in the crockpot and then dump the cranberries on top.
Stir the brown sugar and salt into the melted butter and then pour the mixture all over the cranberries and sweet potatoes.
Cook on low for 4-6 hours and then serve. It really is that easy! Enjoy! (My husband thought that the potatoes weren’t quite sweet enough so he sprinkled a little bit of brown sugar on the top right before eating and declared it perfect.)