1Mix tomatoes, Cheddar cheese, cucumbers, red bell pepper, green bell pepper, red onion, black olives, and Italian seasoning together in a large bowl.
2Bring a large pot of lightly salted water to a boil. Cook spaghetti in the boiling water, stirring occasionally until cooked through but firm to the bite, about 12 minutes. Drain and run under cold water.
3Toss spaghetti with tomato mixture; fold in chicken. Pour salad dressing over salad; toss to coat. Refrigerate until flavors have blended, about 2 hours.
Footnotes
Tip
Aluminum foil helps keep food moist, ensures it cooks evenly, keeps leftovers fresh, and makes clean-up easy.