Thanksgiving Sweet Potatoes

For all you Americans, Thanksgiving is coming up, and I thought I'd share my family's quintessential Thanksgiving fare, the pan of sweet potatoes.  Yams, if you will.  Do I know the difference?  Erm... Yams are yellow, I think, and sweet potatoes are orange.  Or something.  This recipe came from my sweet MIL Lanell, who is a fantastic cook.  And these are less of what you'd call a vegetable, and more of a little party in your mouth, as I think the amount of sugar negates all nutritional value.  :)  But it's Thanksgiving!  Who's looking to be healthy?

Persephone's Candied Sweet Potatoes

4-6 large sweet potatoes, cooked whole and  cooled
3/4 c. sugar
1/4 c. butter
1/2 tsp salt
8 oz of Dr. Pepper
1 bag mini marshmallows

( You know you want to see it done, right? )