Cook the pasta, according to the package directions. Drain, and run under cold water- tossing until cool to the touch. Set aside.
1 lb pasta
Cook the shrimp according to the package directions. Pick a couple of the plumpest shrimp, remove them from the skillet & set aside.
2 lbs frozen shrimp scampi
Use a slotted spoon, letting the juices drain back into the pan, and remove the rest of the shrimp to a waiting cutting board. Roughly chop them.
Scrape the pan, getting all the juicy bits and herbs up and whisked into the butter mixture. Measure 6 tablespoons of this out into a waiting prep bowl.
6 tbsp seasoned juices from the cooked shrimp scampi
To a large mixing bowl add the pasta, celery, onions, and tomatoes. Gently toss to evenly combine.
1/2 cup celery, 1 bunch green onions, 1 cup grape tomatoes
In a separate, small mixing bowl whisk together the mayo, zest, garlic, & shrimp butter. Whisk together until smooth.
1 cup mayonnaise, 2 tsp freshly grated lemon zest, 2 tsp minced garlic
Pour the dressing out over top of the salad mixture. Toss everything to coat evenly.
Cover the pasta salad and chill for 2-3 hours before serving.