Cook the pasta according to the package instructions, adding a tablespoon of kosher salt to the boiling water for flavor. Just before the pasta finishes cooking, add the broccoli florets to the pot. Let them boil together for about 30 seconds.

Drain the pasta and broccoli using a large colander. Rinse them thoroughly under cold water to stop the cooking process, ensuring they're cool and bright.

In a large mixing bowl, combine mayonnaise, vinegar, salt, pepper, and sugar. Stir these ingredients together until you achieve a smooth dressing.

Add the cooked pasta and broccoli to the bowl with the dressing. Mix well to coat everything evenly. Add the cucumber, red pepper, olives, and green onions, and stir to combine.

Taste the salad and adjust the seasonings if needed. Cover and refrigerate the salad until you're ready to serve. Stir the salad again just before serving to ensure it's well mixed.