Ginger Pear Upside-Down Cake

Mix brown sugar, ginger, grated rinds together in a small bowl. Sprinkle half of mixture over butter in pan. Arrange pear slices over sugar mixture in pan. Batter: Mix together with large spoon in bowl until all the ingredients are blended. Pour over pear slices as evenly as possible. With the tip of the spoon, gently spread to corners of pan. Sprinkle the second half of the sugar mixture over the top of the batter. Bake 30 minutes in 400 degrees oven. Immediately turn upside-down on serving plate. Let pan remain a few minutes to allow sugar mixture to run over cake. Serve warm.