Gather all ingredients.
All gathered ingredients.
Bring a large pot of lightly salted water to a boil. Cook pasta in the boiling water, stirring occasionally, until tender yet firm to the bite, about 10 to 12 minutes; rinse under cold water and drain.
Whisk Italian dressing and salad spice mix together until smooth. Combine pasta, tomatoes, bell peppers, and olives in a salad bowl.
All ingredients and cooked pasta into a bowl.
Pour dressing over salad and toss to coat.
Pour dressing over salad and toss to coat.
Refrigerate salad, 8 hours to overnight.