Cook macaroni according to the directions on the package. Rinse and Drain.
While the macaroni is cooking, dice the zucchini, celery, red onion and sweet pepper.
Mix all of the ingredients for the dressing in a large bowl.
Add the diced veggies to the bowl. Add the relish.
Add the macaroni and stir to combine well.
Slice the green onions and sprinkle on top of the salad.
Refrigerate for at least an hour before eating. It is better chilled and when the salad has time for the flavours to combine.