Yes, it is possible to be vegan, build muscle and have well defined abs! Although it's not hard to get enough protien as a vegan, you often have to eat lots of stuff you may not want - fats, sugars and simple carbs - in order to get it.
I've been vegan for about 2 years now, and I rely on a protein powder mix composed of pea, rice, hemp and potato protein extract that I order from TrueNutrition.com. I just posted a video showing how I use this protein powder to make no-cook protein bars and a seasoned protein crumble that I use with steamed veggies every day.
If you're interested in creative ways to use non-animal protein in your diet - watch the video.
You can see the results here:
Thanks for the post and vid. Will give it a try!