Preheat oven to 375°. Cook sweet potatoes by boiling in water for 15 to 20 minutes, until slightly soft but not mushy. Remove from pot and allow to cool.
Once potatoes have cooled down simply pull off the skins.
Place cooked and peeled potatoes into the bowl of a stand mixer and mash potatoes.
Add eggs, 1/4 cup of brown sugar, 1/4 cup of butter, salt and cinnamon and blend well.
Place mixture in casserole.
If desired, place the pecan halves on top of the mixture. This is where it gets fun-make a snowflake design, your family's monogram, scatter in a random pattern--be as creative [or not] as you choose.
Sprinkle the remaining brown sugar over the top and then the rest of the melted butter.
Bake for 25 minutes