Turnip Puff

2 cups cooked, mashed turnips, cooled 
1 cup bread crumbs
1/2 cup melted butter
1 teaspoon sugar
1/2 teaspoon salt
1/4 teaspoon pepper
2 eggs, separated

Combine turnips, bread crumbs, margarine, sugar, salt, pepper, and beaten egg yolks. Beat egg whites until stiff peaks form; fold into turnip mixture.

Spoon turnip mixture into a buttered 1-quart casserole. Bake turnip puff at 350° for 40 minutes.