Banana Sweet Potatoes - cooking recipe

Ingredients

6 medium sweet potatoes (2 1/4 pounds)
3/4 cup mashed bananas or 3/4 cup applesauce
1/4 cup butter or 1/4 cup margarine, softened
1/2 teaspoon lemon peel, finely shredded
1/2 teaspoon salt
2 egg yolks
2 egg whites, beaten stiff

Preparation

In a large saucepan cook sweet potatoes, covered, in enough boiling salted water to cover for 30-40 minutes or until tender; drain.
Preheat oven to 350 degrees Fahrenheit.
Peel potatoes; mash on low speed of electric mixer (do not add butter or milk).
Add banana, butter or margarine, lemon peel, and salt. Beat until fluffy.
Add yolks; beat well. Carefully fold stiff-beaten egg whites into potato mixture; turn into a buttered 1 1/2-quart casserole.
Bake, covered, at 350 degrees Fahrenheit for 20 minutes; uncover and bake 25 minutes.