Sweet Potato (Yam) Casserole With Marshmallows

Ingredients
1 (40 ounce) can cut yams, drained or (2-3 large fresh boiled and drained)
1/2 cup brown sugar
1/4 teaspoon salt
1/2 teaspoon cinnamon
1 egg, beaten
4 tablespoons melted butter
1 (16 ounce) bag miniature marshmallows
Directions
Butter 1 quart baking dish.
Heat oven to 350 degrees.
Mash yams in a large bowl and add brown sugar, salt, cinnamon, egg, and melted butter.
Mix well.
Place 1/2 mixture in baking dish.
Top with a layer of marshmallows, then add remaining mixture.
Bake for 30 minutes.
Remove from oven and top with remaining marshmallows.
Bake for another 10 minutes or until marshmallows are lightly browned.