Sweet Potato Angel Biscuits
["3 large sweet potatoes", "3 packs active dry yeast", "3/4 c. warm water", "7 1/2 c. all-purpose flour", "1 1/2 c. sugar", "1 Tbsp. baking powder", "1 Tbsp. salt", "1 1/2 c. shortening"]
["Wash sweet potatoes; bake at 375\u00b0 for 1 hour or until done. Let potatoes cool to touch; peel and mash. Set aside 3 cups and keep warm. Combine yeast and warm water in a 2-cup liquid measuring cup; let stand 5 minutes. Combine flour and next 3 ingredients in a large bowl; cut in shortening with a pastry blender or fork until mixture is crumbly. Add yeast mixture and warm sweet potatoes, stirring until dry ingredients are moistened. Turn dough out onto a floured surface. Cut into biscuits and bake at 375\u00b0 for 10 to 12 minutes."]
["sweet potatoes", "yeast", "warm water", "flour", "sugar", "baking powder", "salt", "shortening"]