Preheat oven to 350o F. Line muffin pan with muffin cups. Set aside.
Sift together first 5 ingredients. Set aside. Cream butter and sugar until creamy, then add egg yolk. Beat well.
Add alternately DEL MONTE Tomato Sauce and flour mixture while beating until well blended. Set aside.
Beat egg white with cream of tartar until foamy. Add sugar gradually. Continue beating until stiff but not dry. Fold in flour mixture and cashew nuts.
Fill muffin cup with half-full of batter. Top with raisins. Bake for 10-12 minutes or until a toothpick inserted in the center comes out clean.
Makes 35 muffins