Disclaimer: I'm not a veg by any means (but eat so little meat that people often think I am!) :))
Anyways, my fave go to is also pasta (salad). If doing for a large group that I don't know what everyone will eat, I usually just do noodles, cheese and dressing. For myself I usually toss over lettuce and add in veggies (Peppers, tomatoes, etc). Also a good hot summer show food, as it's served cold. For a mixed group could also add some cubed salami or ham on the side.
Salad. I mix spinach and baby greens, top with walnuts, almonds, strawberries, raspberries, blackberries and feta cheese. Or any combo of what I have from that. I'm not a big dressing person but serve with Raspberry vinaigrette..
Homemade granola/protein power bars
Cut fruit/veggies and dip
Pita and dip