1. Heat oven to 350 degrees F. Lightly brush 9-inch round cake pan with some melted butter; reserve remaining butter. Sprinkle brown sugar over bottom of pan. Arrange 7 pineapple slices in a single layer on top (reserve remaining slice for another use).
2. Combine flour, granulated sugar, baking soda, ginger, cinnamon and salt in large bowl. Whisk together remaining butter, egg, egg white, milk, molasses and vanilla in small bowl.
3. Stir wet ingredients into dry ingredients until blended. Pour into prepared pan. Bake 40 minutes or until toothpick inserted in center comes out clean. Immediately invert cake onto serving platter; remove pan. Serve warm. Makes 12 servings.