Just made this this morning. Good stuff. Enjoy.
1 1/2 cups peeled and cubed sweet potatoes
2 cups all purpose flour
1 teaspoon cinnamon
1 tablespoon baking powder
1/2 teaspoon salt
6 egg whites, at room temperature
1 1/3 cups milk
1/4 cup firmly packed light brown sugar
1/4 cup butter, melted
1 tablespoon grated orange rind (optional)
4 strips of bacon
Vegetable spray, for waffle iron
Special equipment: waffle iron
Put cubed sweet potatoes on one half of a baking sheet and the bacon strips on the other half. Place the sheet in a 400 degree pre-heated oven for 20 minutes. Remove baking sheet, place the bacon on a paper-towel-lined plate, and place the sweet potato in a food processor. Process the sweet potatoes until chopped well (20 to 30 seconds). When bacon is cooled, cut into somewhat thick pieces (1/4 inch maybe). Set potatoes and bacon aside.
In a large bowl, whisk together flour, baking powder, cinnamon, and salt and set aside.
In another bowl combine the sweet potatoes, milk, brown sugar, butter, bacon pieces, and grated orange rind. Stir the sweet potato mixture into the flour mixture and thoroughly combine. Beat egg whites until stiff peaks form. Gradually fold egg whites into batter 1/3 at a time. The batter will be thick. Using a No. 20 disher (scoop), place 2 scoops of batter onto a preheated, oiled waffle iron, and cook until lightly browned, about 5 to 6 minutes.