Cinnamon Yam Waffles

Yield:	4 Servings
Categories:	Breakfast, Potatoes

2	c	All-purpose flour; sifted
3	ts	Baking powder
1	ts	Salt
1/4	ts	Cinnamon
3		Eggs; separated
1 1/2	c	Milk
3/4	c	Louisiana yams; cooked and mashed
1/4	c	Shortening; melted
1/3	c	Walnuts; chopped