I don't eat nearly enough sweet potatoes. I know they are better for you than regular potatoes and packed with vitamins and such but I just can't get into them as a side dish. I like to keep sweets out of my main meals in firmly in dessert. Luckily they are perfection in a tin when baked into a pie. This recipe starts off with steamed potatoes and then makes a custard out of them using buttermilk which I imagine adds a delicious tang to the filling. She then folds in egg whites which lighten the texture. The perfect alternative to pumpkin pie!