Calorific- really? How calorific? 230 kcal for a (nearly) 200g portion. I doubt you could find a lower calorie source of protein (maybe Quorn?)
http://nutritiondata.self.com/facts/legumes-and-legume-products/4338/2
I dress them with some balsamic vinegar and a little olive oil, when still warm. Yum.
Edited: 11/02/2013 at 11:42