Vegan sweet potato biscuits

Think being vegan means you have to give up biscuits altogether? Make sweet potato biscuits. Theses are light and good to accompany a heavy meal.

1. Place sweet potatoes in Dutch oven and cover with water. Bring to a boil. Reduce heat and simmer for 20 minutes (fork tender). Drain. cool completely.
2. Place oven rack in the top 1/3 position preheat oven to 450°F.
3. Pour vinegar into a liquid measuring cup and add the soy milk.
4. Peel sweet potato and force it through the medium disk of a food mill, into a large bowl. Add soy milk and whisk until smooth.
5. In a separate, large bowl, sift together all-purpose flour, cake flour, baking powder, and sugar.
6. Add the shortening and margarine. Cut them into the dry ingredients using a butter knife, until it resembles corn meal.
7. Add the wet mixture to the dry and stir until a soft, crumbly dough forms.
8. Turn the dough out onto a well-floured surface and knead 8 to 10 times. Only knead enough to keep the dough together.
9. Roll dough out into a rectangle 6 by 12 inches.
10. Using a knife or a rectangular cookie cutter, cut the dough into 12 biscuits.
11. Place the biscuits onto an ungreased insulated baking sheet or doubled regular baking sheets.
12. Bake 12-14 minutes, until the biscuits have risen and their edges are lightly browned.