Heat oven to 220ºC . Grease jelly roll pan. Mix oats, quarter cup bisquick, brown sugar, butter (or margarine) and cinnamon. Reserve. Beat remaining ingredients with whisk until well-blended. Pour into pan. Spread batter to edges. Sprinkle with oats mixture. Bake 14 to 16 minutes, or until light golden brown. Cut into 6 pieces and serve.