Cook the 1/2 pound uncooked rotini pasta according to package directions for al dente. Rinse under cold water to stop cooking process. Tap and set aside.
In a small bowl, whisk together the 1/2 cup olive oil, 1/4 cup water, 1 tablespoon apple cider vinegar and 2 tablespoons dry Ranch dressing mix. Blend until combined.
In a large mixing bowl, toss together cooled and cooked pasta, minced 1/3 cup carrots, 1/3 cup white onion, 1/3 cup celery, and quartered 1 cup grape tomatoes and dressing mix.
Cover and chill for 30 minutes to 6 hours before serving. Serve chilled or at room temperature. If the mixture gets too dry, add 1 tablespoon of olive oil and 1 tablespoon of apple cider vinegar with a pinch of salt to brighten it back up.
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Notes
Storage: This ranch pasta salad has a sweet spot for serving and I would say that is about 6-12 hours after you make it. Let it sit too long and it gets a little gummy, but if it doesn't sit long enough, the flavors can't marry. It will stay good (just not A+) in the fridge for up to 5 days.Freezing: Unfortunately, I do not suggest freezing pasta salad.