01 - Boil pasta in generously 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, and ranch seasoning mix until smooth. Stir in 1 tablespoon of milk to reach a pourable consistency, adding more as needed.
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, taking care not to crush the tomatoes.
05 - Mix until all components are uniformly distributed. Taste and adjust seasoning with salt and pepper as needed.
06 - Cover and refrigerate for at least 30 minutes to allow the flavors to meld. Serve cold for the best taste and texture.