Heat griddle or skillet over medium-high heat (375°F). Brush with vegetable oil if necessary or spray with cooking spray before heating. In large bowl, stir together Bisquick mix, poppy seed and grated lemon peel. In small bowl, stir club soda, egg and butter with whisk; gently stir into dry ingredients with whisk. (Mixture will be lumpy.) Let stand 3 minutes.