Godsgrl, that's pretty much how my Mom made them, the quantity though, was a least a stick of butter. 'Course EVERYTHING had to have butter in it for her. And lots of honey and brown sugar. Broil or bake to get the marshmellows browned - but not burnt.
My a bit more healthy version: cook and mash up the sweet potatoes, beat in a few eggs, spread in casserole. Top casserole with struesel-like crumbles of brown sugar, ground pecans/pecan meal, dash of cloves, bit of cinnamon and some canola oil. Bake or broil to get the top crunchy. I cheat and use a can of pumpkin sometimes.
My a bit more healthy version: cook and mash up the sweet potatoes, beat in a few eggs, spread in casserole. Top casserole with struesel-like crumbles of brown sugar, ground pecans/pecan meal, dash of cloves, bit of cinnamon and some canola oil. Bake or broil to get the top crunchy. I cheat and use a can of pumpkin sometimes.