Banana Cream Layer Cake

Name: Banana Cream Layer Cake
Ingredients: 1/2 cup nonfat buttermilk, (see Tip); 2 large eggs; 1/2 cup whipping cream; 1/2 teaspoon vanilla extract; 1 1/2 cups mashed very ripe bananas, (about 3), plus 2 whole bananas, divided; 1 teaspoon unflavored gelatin; 1 teaspoon vanilla extract; 1/2 teaspoon salt Bavarian Cream; 1 cup sugar; 3/4 cup low-fat milk; 1/3 cup canola oil; 2 tablespoons sugar; 1/2 teaspoon baking soda; Cake; 1 teaspoon baking powder; 1 cup whole-wheat pastry flour, (see Ingredient Note); 1 cup all-purpose flour