Add the sugar, lemon juice, and pumpkin and beat well.  Blend dry ingredients together and add to the egg/pumpkin mixture. Beat well. Put waxed paper on cookie sheet, grease with Pam spray. Pour batter on top and bake 375 F. for 15 minutes. While still warm, put towel on top of cake and roll up. When cool, unroll and frost with the following: Mix above ingredients well and spread over the unrolled cake. Roll up again, and refrigerate until cheese sets.  Slice and serve!