Okay I have to give an update!!
So after reading all the great ideas (and Suzanne I never thought to add zucchini at all!) and thought about adding more veggies, here is my first experiment.
I boiled a half cup of tiny shell pasta (I figure if I make one serving I cant go nuts). During the last 2 minutes of cooking I threw in a handful of frozen peas, half a grated carrot, and half a zucchini in dice the size of the shells. Then drained and rinsed til cold. I made a dressing of nonfat yogurt, lowfat mayo, and ranch powder. I seasoned it up with onion powder, garlic powder, salt and pepper. I mixed it into the shells/veggies. I added 3 chopped green onions and about 2oz cubed chicken breast. Then added one slice of crumbled thin bacon (40 cal). Chilled a bit. OMG YUM!!!!!! It was SO fantastic.
What I learned:
Next time I will add at least double the veggies. The zucchini was almost indistinguishable from the pasta. It was nice and "al dente" and blended right in so it seemed like a huge serving of pasta. Next time I may even triple the veggies for the same amt of pasta and slightly more dressing. And more chicken too. Oh and I did add about 1T light ranch at the end because I wanted it to be a little "richer." Boy was it great!
Will be trying more ideas soon