This is another pinch from Cook's Country -- but since they have a protective site, I manually entered the stuff. And it was easy and delicious and no-fuss and delicious. I did add the maple syrup, marshmallows, pecan bits, and the broiling instructions -- hence the fact that there's no quantities given!
First, prep the sweet potatoes. Peel, then quarter lengthwise. Finally, cut into 1/4" thick slices.
Combine butter, 2 tbsp cream, sugar, salt, pepper, cayenne, and sweet potatoes in large saucepan. Cook, covered, over low heat until potatoes are fall-apart tender, 35 - 40 minutes.
Remove them from the heat, then add the rest of the cream and mash with potato masher. Use maple syrup to bring it to the correct consistency. If you prefer more sweet, use less cream in this step and more of the syrup.
Place mashed sweet potatoes into a casserole dish, sprinkle with marshmallows and pecan bits, then broil for a couple of minutes in the oven -- just until the marshmallows start to tan nicely.
**Note -- you may make this in a bigger batch, but you need to increase the time, as well as the ingredients.