In a small mixing bowl combine the cut rhubarb pieces and the 1/4 cup of Splenda and stir well.
Set aside.
Preheat an oven to 350 degrees F (175 degrees C)
Grease and flour your 8 inch springform pan. ( use a small amount of butter and Carbalose four)
In a large mixing bowl, cream the butter and add the eggs.
Add the cream cheese and beat until mixed well.
Add the half and half cream and vanilla extract and mix well.
Add the sweetener and blend well.
In a medium sized bowl, sift the Carbalose flour, Almond Flour, baking powder and salt.
Slowly add the dry ingredients into the wet, in intervals, mixing with an electric mixer in between additions.(a couple of tablespoons at a time is good)
Once the batter is well combined pour the batter into a greased and floured springform pan