I'm a vegetarian and am absolutely nuts about nuts.

I can't remember off the top of my head which ones contain the most protein but right now I am enjoying: almonds, walnuts, cashews, pecans, and macadamias.

I also eat hummus with a lot of my veggies; mine contains 7g/2 tbsp serving.

Peanut butter is great but also calorically dense, so something to watch out for.

I agree with the post warning about soy: I currently eat soy very infrequently but if you like it it is a decent source of protein.

I have bought the morningstar brand of veggiepatties with (I think) ~13g protein per serving, but have not tried them yet. If you have I'd be interested to hear how they taste.

I also have 3 eggs plus a few oz. cheese every morning for breakfast - some get tired of this really quick though. I guess I'm lucky that I like eggs.

If I remember anything else I'll let you know