Heat oven to 325 degrees F.
Spray an 8-inch round pan with baking spray. Set aside.
In a small bowl, sift together flour, baking powder, and salt. Set aside.
Beat eggs and sugar at high speed with an electric mixer until thick and ribbony, about 10-15 minutes.
Stir in raisins, walnuts, and melted butter.
Fold in apples and vanilla.
Stir in dry ingredients.
Spoon into prepared pan.
Press down on batter until no air remains.
Bake for 50-60 minutes or until done.