Twice Baked Sweet Potatoes

Preheat oven to 400 degrees. Prick potatoes with a fork, and bake until soft (about 50 minutes.) Allow to cool slightly. Cut lengthwise slit in potatoes leaving about 1 inch on either end. Scoop out potatoe leaving 1/2 inch lining on skin. Place half of scooped out potatoe in food processer and blend until smooth. Place processed potatoe with remaining half of potatoe in a bowl and stir-in sour cream, 6 T butter, 1 cup brown sugar, lemon juice, and nutmeg. Season with salt and pepper. Reduce temperature in oven to 350 degrees. Scoop mixture into 12 skins, discarding 2. Top with remaining brown sugar, butter, and marshmallows. Place on a rimmed sheet and bake until hot and marshmallows are golden brown (7-10 minutes.)