01 - Boil rotini or penne in salted water until al dente. Drain, rinse under cold running water, and spread out to cool completely.
02 - In a large bowl, whisk together mayonnaise, sour cream, and ranch seasoning mix. Stir in 1 tablespoon of milk and add more as needed to reach a pourable consistency.
03 - Add the cooled pasta to the dressing and toss thoroughly 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.
05 - Taste the salad and adjust salt, pepper, or ranch seasoning as needed until the flavor balance is right.
06 - Cover and refrigerate for at least 30 minutes to allow the flavors to meld together before serving.