Pick sweet potatoes with a fork and microwave until tender flipping half way through the cooking process. (About 15 to 20 minutes – these can be done ahead of time. Just place the flesh in a bowl and refrigerate). Immediacy slice potatoes in half lengthwise, allowing some of the moisture to escape, and the potatoes to cool. Once the potatoes have cooled enough to handle using a spoon scoop out the flesh into the bowl of a food processor and then add the remaining sugar and salt, process until smooth.
Bake at 425 for 15 minutes, reduce heat to 350 and continue baking for 35 to 40 minutes or until edges firm up and center jiggles slightly when shaken. (center should be 165F)