Sweet Potato Biscuits

2 c. roasted, mashed sweet potatoes
1/2 c. butter melted
1/2 c. brown sugar (could reduce...1/2 c. makes for a sweeter biscuit)
2/3 c. buttermilk
2 c. flour
1 T baking powder
1/2 tsp baking soda
1 tsp salt
1 tsp ground ginger
1/2 tsp ground white pepper (optional)
1/4 tsp grated nutmeg

To roast, rinse and dry the potato and roast at 375 degrees for about 45 minutes or until very soft.  peel and mash while still warm.  place in mixing bowl and add melted butter, brown sugar and buttermilk.  mix well. 
In another bowl, sift together the rest of the ingredients.  Add to the potato mixture and stir to combine.  Don't overmix.  The dough should be quite tacky.  you may either drop biscuits onto a prepared sheet pan or lightly pat out and cut.  Add flour as needed to be able to work the dough. 
Bake at 375 for about 20 minutes.