In a small bowl, dissolve the yeast in ⅔ cup warm (110 to 115-degree) water. I just poured ⅔ cup hot water in the bowl and kept checking with my candy thermometer until it got to be the right temperature, then added the yeast. Set aside.
In a mixing bowl, cream together the butter and sugar until fluffy. Add the eggs, sweet potatoes, salt, cinnamon, and remaining ⅔ cup water and mix until smooth.
Add flour, a cup at a time, until you have a soft dough.
Remove to a large greased bowl and flip the dough once to coat the top. Cover with plastic wrap and refrigerate overnight.**
Remove from refrigerator and set out until doubled in size, about 2 hours.
Preheat oven to 375 degrees. Divide the dough into three equal parts.
Roll each part into a log onto a lightly floured surface. Cut log into 8 uniform slices.
Roll each slice into a ball and divide balls into three greased 9-inch round baking pans.
Bake for 20 to 25 minutes until golden brown. Remove and invert onto a cooling rack. Wait until cooled slightly to tear rolls apart.
Notes
*I just used store-bought, premade mashed sweet potatoes, but this is a great way to use leftover homemade mashed sweet potatoes as well! **Refrigerating the dough overnight is optional. I've found it easier to handle and create uniform pieces when the dough has been chilled.
Recipe by Simple, Sweet & Savory at https://www.simplesweetsavory.com/cinnamon-sweet-potato-rolls/