Preheat oven to 350 degrees.

Mix batter ingredients in blender or food processor until well blended.  Pour 3/4 cup of the batter into a greased 8 x 8 inch pan, tilting pan to distribute evenly.  Bake for about 10 minutes, until set but not overly browned.

While batter is baking, mix filling ingredients in medium bowl until well blended.  Spread evenly over baked bottom layer.  Mix remaining batter again to blend, then carefully pour it over cheese layer and spread with spatula to cover all the filling.

Return to oven and bake for another 30 to 40 minutes, until the top is puffed, set, and lightly browned.  Wait 5 to 10 minutes before serving, then cut into squares and serve with sour cream and jam.

Makes 4 servings.