The best sources of vegetable protein powders are Sacha Inchi (a nut from South America), pea, hemp, brown rice and most nuts and seeds. Sacha Inchi is by far the best and you can add it to your blast it is also rich in omega 3 fats which are so important for our health.
Check out this link that shows the comparison of vegetable proteins. http://travellingdietitian.com/2013/11/26/sacha-inchi-protein-powder-high-protein-and-omega-3-rich-plant-based-protein-tdapproved/
I hope this helps
Wally Bishop C.N.C.