Break the broccoli and cauliflower into small, bite-sized flowerettes.
Drain the pitted ripe olives and stuffed green olives and add them to a large bowl with the broccoli and cauliflower.
Add the grape tomatoes, finely chopped purple or green onions, and grated carrot to the bowl.
Crumble the reduced-fat feta cheese over the vegetables.
Pour the low-fat Italian salad dressing over all the ingredients.
Toss everything together to coat the vegetables evenly with the dressing.
Transfer the salad to a covered container or cover the bowl tightly with plastic wrap.
Refrigerate for at least 8 hours to allow the flavors to meld.
Occasionally toss the salad while refrigerating to distribute the dressing evenly.
Give the salad one final toss before serving and enjoy.