I, personally, find sweet potatoes with marshmallows disgusting. Sweet potatoes themselves, however, have great potential as a tasty vegetable. After some hunting around I have found a way to fix them that satisfies all of my in-laws' various allergy and dietary restraints (egg, gluten, and lactose free!) , health standards, and still seems festive and suitable for a holiday meal. It's also easy enough and cheap enough to fix in quantities to satisfy half a dozen more-or-less adolescent boys along with their extended family.
So this is what I am taking for Thanksgiving (only about 3-4 times as much):
Mashed Sweet Potatoes and Apples
2 large sweet potatoes (I use the orangier kind, which are sometimes called yams, but which I understand technically are not, just a variety of sweet potato.)
2 T Butter
2 T Honey
1 t. Cinnamon
1/2 t. Allspice
1 cooking apple, peeled and chopped
Peel and chop sweet potatoes; cook until tender. Drain and pour into bowl for mashing. (Save liquid if you don't want to use milk.) Place the butter in the bottom of the pan and melt; add honey and spices. Saute apple in it until tender. Add to sweet potatoes and mash with either a little reserved cooking liquid or milk if everyone is lactose-tolerant.