In a stand mixer, using the paddle attachment, add the mashed sweet potato, milk, melted butter, eggs, pure maple syrup, and packet of instant yeast. Mix on medium-slow speed until combined.
Add in the kosher salt and 2 cups of the flour. Mix again, start on low speed, until the mixture becomes slightly sticky and forms a shaggy mass of dough.
Place the dough ball into the prepared large bowl. Cover with a clean towel and allow the dough to do it's first rise for 45-60 minutes at room temperature until the dough has doubled in size.
Carefully deflate the dough ball and then divide it into 15 equal pieces. Form each piece into a ball and place them inside the prepared 9×13 baking pan.