Heat oven to 450~. Grease large cookie sheet. In medium bowl, beat egg whites until foamy. Gradually add sugar, beating until stiff peaks form; set aside. Beat egg yolks; stir in orange juice, orange peel, salt and milk. Fold egg yolk mix into beaten egg whites. Dip bread slices into egg mix until evenly coated. Place on prepared cookie sheet. Bake for 5-8 minutes or until golden brown ( do not turn toast). In small saucepan, combine sour cream and marmalade; heat over low heat just until warmed. Serve immediately with sauce. ----