Preheat oven to 350.  Combine milk, egg, parsley, and onion.  Stir in bisquick until just moistened; add cheese and mix as little as possible to distribute cheese evenly.  Place dough in an ungreased 9-inch cake pan.  Slowly drizzle margarine over dough.  Bake 25-30 minutes or until center springs back when pressed lightly.  Do not overbake.  Remove from oven and invert cheese bread on serving plate.  Cut into 6-8 wedges.