I'm with Freedom - marshmallows don't go with sweet potatoes for me. My family likes dressing baked in a casserole separately from the turkey.

My Eastern European-American family (Czech on my mom's side, Polish and Ukrainian on my dad's) eats bread dumplings and sauerkraut with our turkey instead of mashed potatoes. Here's a picture of bread dumplings. You boil the dough in a loaf, then slice the dumplings about 3/4" thick, then top them with brown gravy. They're different from potato dumplings.