Super food known as Acai. When I lived in Brazil I ate this all of the time. When paired with granola and banana it is fibrous and packed with energy (calories).
From Universaltaste.com (the place I get my Acai from)...
Acai is an energizing super-fruit that is rich in protein, fiber, Vitamin E, minerals, and important essential fatty acids. Acai's antioxidant concentration surpasses even blueberries. It provides natural sustained energy and it is an excellent source of protein and essential omegas. It is a natural cholesterol controller which helps to reduce bad cholesterol and increases the good. Acai has 33% more anthocyanin than red wine. It helps to build the immune system, fight infections, protect the heart, and it may help to control prostate enlargement. It also may be used to combat the premature aging process.
http://www.universaltaste.com/acai.htm