Mashed Sweet Potatoes with Marshmallows

Description
Contributed by Catsrecipes Y-Group
 * Source: my old recipes
 * Serves 10.

Ingredients

 * 4 lbs. sweet potatoes or yams, scrubbed
 * boiling salted water
 * ¼ cup margarine
 * 9 large marshmallows, halved

Directions

 * 1) Cook potatoes in large pot of boiling salted water about 40 minutes until tender when pierced.
 * 2) Drain.
 * 3) Cool slightly, peel and mash in large bowl.
 * 4) Stir in butter until smooth.
 * 5) Scrape into a greased shallow 2 quart casserole.
 * 6) May now be covered and refrigerated up to 2 days.
 * 7) To serve, heat oven to 375°F.
 * 8) Arrange marshmallows on top of potatoes.
 * 9) Bake 20 minutes until marshmallows puff and brown and potatoes are hot.