Just a note...
This makes a LOT of pasta salad. If you want to scale this down I'd just divide all the ingredients in half. I'm giving you the full recipe because that's how I make it and I know the results.
1) Wash your dog. You thought I was going to say "wash your hands" didn't you? Well I didn't so nahhh! But really, you don't know where those things have been. Forget the dog and go wash your hands.
2) Cook your pasta, drain, and chill for at least 1/2 an hour. The colder the better.
3) Use a good knife and chop up everything that needs chopping and put in a bowl. If there's a chef version of "tennis elbow" you're probably about to get it.
4) Ok, you've chopped everything that needs chopping and drained everything that needs draining. Put everything but the pasta and parmesan cheese in bowl and add your lemon juice and lemon zest. Fold everything together.
5) Add EVERTHING to your pasta (including the parmesan cheese). Fold together until thoroughly combined. Salt and Pepper to taste.
6) I Like to cover the bowl and put the whole thing back in the fridge to rest for at least an hour before serving.