01 - Boil pasta according to package directions until al dente. Drain thoroughly, rinse under cold water to stop cooking, and transfer to a large bowl to cool completely.
02 - In a separate mixing bowl, whisk together sour cream, mayonnaise, and ranch seasoning packet until completely smooth and well blended.
03 - Pour dressing over cooled pasta. Add shredded cheddar, crumbled bacon, thawed peas, and sliced green onions. Fold gently until evenly distributed.
04 - Refrigerate pasta salad for at least 1 hour, or up to overnight, to allow flavors to develop fully. Keep covered until ready to serve.
05 - Top with additional crispy bacon, extra cheddar, or fresh green onions just before serving. Serve chilled for best texture and flavor.