Mash Sweet Potatoes: Peel and dice sweet potato(es) and add to a small pot with water. Bring to a boil and boil for 10-15 minutes until potatoes are super soft. Drain and mash well and set aside to cool.
Activate Yeast: Add sugar and warmed milk (you can heat milk in the microwave for about 10 seconds to warm) to the bowl of a stand mixer and whisk. Sprinkle yeast on top and then let sit for 10 minutes to activate.
Create Dough: Add egg, melted butter, and mashed sweet potato to the stand mixer with the dough hook attachment and mix until egg is broken and mashed potato mixed well with the milk and butter. With the mixer running, slowly add the flour, about 1 cup at a time until all of the flour is added and well incorporated. Proof: Remove dough from the mixer and add it to a large bowl and cover with plastic wrap or a linen towel. Let rise for 1 hr.
Separate into Rolls: After the dough has risen, remove it from the bowl and use a dough cutter, or butter knife to separate the dough in half. From each half, cut off about 2.5 oz pieces of dough and roll them into balls. Add those 15 balls to a lightly greased baking dish.
Preheat and Proof again: Preheat the oven to 350 degrees F and lightly cover the baking dish with a clean linen towel to let the dough balls rise again for 30-45 minutes.
Bake: After the dough has risen again, add to the middle rack of the oven and bake for 15 minutes.
Serve and Enjoy!