Preheat oven to 350°. Grease a 9 x 5” loaf pan, and set aside.
In a large bowl or the base of a mixer, beat together 1 cup of the cranberry sauce, oil, sugar, egg, and vanilla. Add the flour, salt, baking soda, and ground cinnamon. Stir well just until evenly combined.
Spread into the prepared pan. Dollop the remaining cranberry sauce on top, then bake about 50 minutes, or until a tester inserted in the center comes out clean.
