Sprinkle brown sugar in bottom of well-greased pan. Dot with butter. Drain pineapple. Place slices in pan with cherry in center of each pineapple slice. Sift together flour, baking powder and salt. Cream shortening. Add sugar gradually and beat until fluffy. Add egg and vanilla and beat well. Add flour mixture, a little at a time, alternately with milk. Pour batter over fruit. Bake at 350 degrees F. until brown. for 50 to 60 minutes. Turn upside down on serving plate. (Serves 8-10)