Add the rotini pasta. Cook the pasta according to the package directions until tender.
Drain the pasta in a colander. Rinse the pasta under cold water until cooled. Drain the pasta well.
Add the cooled pasta to a large mixing bowl. Add the cherry tomatoes, cucumbers, broccoli, zucchini, red bell pepper, yellow bell pepper, shredded carrots, red onion, black olives, and parsley.
In a small mixing bowl, add the olive oil, red wine vinegar, lemon juice, Dijon mustard, Italian seasoning, garlic powder, onion powder, salt, black pepper, and crushed red pepper flakes. Using a wire whisk, mix well.
Pour the dressing over the pasta mixture. Toss until the pasta and vegetables are evenly coated.
Cover the bowl. Refrigerate for at least 1 hour.
Stir before serving. Add a splash of red wine vinegar or lemon juice before serving if the pasta absorbs too much dressing.
Notes
Tips and Tricks
Cut the vegetables small - Smaller pieces mix better with the pasta and make the salad easier to serve.Drain the pasta well - Extra water can thin out the dressing and make the salad bland.Taste after chilling - Cold pasta can soften the flavor. Add a little more salt, lemon juice, or red wine vinegar if needed.Keep the pasta from overcooking - Tender pasta works best, but pasta that is too soft can break apart when tossed.
Storing
Store in the Refrigerator - Place the pasta salad in an airtight container and refrigerate for up to 3 days.Stir Before Serving - The dressing may settle at the bottom of the container, so stir well before serving.Refresh if Needed - Add a small splash of red wine vinegar or lemon juice if the pasta absorbs too much dressing.