01 - Boil pasta in salted water until al dente according to package directions. Drain in a colander, rinse under cold water to halt cooking, and set aside to cool completely.
02 - In a large mixing bowl, whisk together mayonnaise, sour cream, ranch seasoning, and 1 tablespoon of milk until smooth. Stir in additional milk if a thinner consistency is preferred.
03 - Add the cooled pasta to the dressing and toss thoroughly until every piece is evenly coated.
04 - Gently fold in the cherry tomatoes, bell pepper, shredded cheddar, bacon bits, green onions, and thawed peas until uniformly distributed.
05 - Taste the salad and adjust salt, pepper, or additional ranch seasoning as needed.
06 - Cover and refrigerate for at least 30 minutes to allow the flavors to meld before serving.