In large mixer bowl, beat together eggs, sugar, and vanilla until light and fluffy. Stir together flour, baking powder, and salt. Blend into creamed mixture. Fold in apple and walnuts. Turn into greased and floured 9x9x2" baking pan. Bake in 325F oven 30-35 Minuten Spoon into dessert dishes. Serve warm with whipped cream and apple slices.
