Mix together all batter ingredients in a blender and whiz until smooth. Mix together all the filling ingredients in a large bowl. Pour half the batter into a lightly greased 9"x13" Pyrex dish. Tilt the pan to evenly cover the bottom. Spoon the filling on top and carefully spread filling out evenly. Pour remaining batter over the filling. Bake at 350°F for 45-50 minutes or until puffed and golden brown.