01 -
Cook the macaroni according to the package directions. Drain and rinse under cold water until cool. Set aside.
02 -
Whisk together the mayonnaise, milk, vinegar, sugar, salt, and pepper in a large bowl. Add the macaroni, carrot, celery, green onion, and grated onion. Gently stir the mixture until well combined.
03 -
Cover and refrigerate for 30 minutes. Gently stir, and top with more green onion, if desired.