You can cut the asparagus and celery larger if you'd like, but I like to keep them around the same size as the peas for a consistent mouth feel. Rinsing is an imperative step to both cool the pasta and wash away extra starch. I know many one-pot pastas don't do this, but with this one you will want to. The pasta salad is ready to serve right away, but is even better the next day, so feel free to prepare it ahead of time.