Place 1 1/2c milk in Dutch oven and heat to scalding. Combine cornmeal, sugar, salt, cinnamon and ginger, add to milk stirring constantly. Cook 2 min. Combine egg, molasses and butter. Add small amount of the hot milk mixture, slowly. Then add to remaining milk mixture. Stir and cook until thickened, 2-5 minutes. Pour remaining milk OVER (do not stir in!) pudding. Cook until set, 5 minutes. LET STAND 10 to 15 minutes before serving.