01 - Boil pasta in heavily salted water until al dente, following package directions. Drain in a colander, rinse thoroughly under cold running water, and spread out to cool completely.
02 - In a large mixing bowl, whisk together mayonnaise, sour cream, ranch seasoning packet, and 1 tablespoon of milk. Add remaining milk as needed to reach a pourable consistency.
03 - Add the cooled pasta to the dressing bowl and toss until every piece is evenly coated.
04 - Gently fold in the halved cherry tomatoes, diced bell pepper, shredded cheddar, bacon bits, sliced 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 a minimum of 30 minutes to allow flavors to meld before serving.