Preheat oven to 350 degrees.  Separate biscuits from the can.  Flatten into about a three-inch circle.  Mix together rhubarb sauce vanilla and cinnamon.  Place a tablespoon of sauce into the center of a dough circle, warp the dough around the rhubarb and pinch to seal tightly. Place seam-side down in a 9x13 pan that has been sprayed with shortening. Brush melted butter or margarine over the tops. Sprinkle with more sugar and cinnamon if desired.

Bake in a heated 350 degree oven 35 to 40 minutes or until golden brown.