Sentence:  I'm convinced that the nut's very nutritiousness is to blame for the dish's poor reputation. They're so dense that a loaf made primarily from nuts would be more suitable for slicing into <WSD>energy bars</WSD> and selling to mountaineering supply shops - hence the main bulk of a nut roast is generally some form of carbohydrate, intended to lighten the load. 
Meaning of the word marked with <WSD> tags:  A supplemental food in bar form, containing cereals or other high-energy foods.