Cook the Pasta: Bring a large pot of salted water to a rolling boil. Add rotini pasta and cook for 8-10 minutes until al dente. Drain and rinse under cold water.

Prep the Vegetables: Wash and prepare the vegetables. Halve cherry tomatoes, dice cucumbers, and slice red onion thinly. Soak sliced onion in cold water for about 10 minutes.

Combine the Ingredients: In a large mixing bowl, add cooled pasta, prepped veggies, shredded cheddar cheese, and bacon. Gently fold everything together.

Dress the Salad: Pour ranch dressing over mixed ingredients, and add a spoonful of sour cream if desired. Toss carefully until well coated.

Chill and Serve: Cover and refrigerate for at least 30 minutes before serving.