Grease and lightly flour two 9X 1 1/2 inch round baking pans.Beat egg whites and remove from mixer bowl. Put in a medium to large mixing bowl.
In the electric mixing bowl,beat butter on medium to high speed about 30 seconds or till softened. Alternately add flour mixture and milk beating on low to medium speed after each addition
just until combined. Fold eggs whites into batter. Spread into prepared pans .
1. Bake in a rectangular pan. 2. After the batter in poured in and spread evenly, drop in fruit and tapioca mixture.
Tapioca mixture: /4 cups of fruit 2 Tbls of lemon juice if discoloring may occur 1[2 C. of sugar 1[4 C. of Tapioca (let sit for 1 to 2 hours so the liquid can infuse)
Bring to a light boil and take off heat. (If desired) This will dissolve the tapioca.Fruit will sink as the cake bakes up.Cake is done with the outside areas turn golden brown and more importantly bubbly fruit filling is evident.