Got this off of a site long ago..that I did not keep name of. Sorry.
Two sweet potatoes , 1 large & the other medium, peeled & cube cut.
2 Tablespoons butter
Salt & pepper to taste
1 egg, well beaten
1 dozen (or as many as you like) marshmallows, mini ones.
Butter, or spray with Pam butter spray, a pie plate or baking dish.
Put potatoes in microwave in steamer bowl for about 8 minutes on high. Till cooked
Then mash; add salt, pepper, butter, sugar & beaten egg.
When smooth transfer to sprayed baking dish or pie plate. Add marshmallow on top. Also add dots of butter around on top .
Bake in pre-heated 350 degree oven until the tops of marshmallows are golden brown.