In a bowl, combine egg and water, stir in flour, cornmeal, baking powder and salt; beat well, then allow tos tand for 5-10 minutes. Heat a nonstick frypan over medium heat. Brush very lightly with vegetable oil. Stir batter, then pour batter, 2 tablespoons at a time, into frypan to make very thin pancakes. Cook until just dry on top. Do not turn. Stack until all pancakes are cooked. Stir batter as it is being used.