01 - Arrange chicken breasts in a single layer at the bottom of a 6-quart slow cooker.
02 - Sprinkle ranch seasoning evenly over the chicken, then arrange cream cheese cubes on top.
03 - Pour chicken broth around the chicken. Cover and cook on LOW for 4 hours or HIGH for 2 hours, until chicken is tender and easily shreddable.
04 - Remove chicken from slow cooker and shred using two forks. Return shredded chicken to the slow cooker. Stir in sour cream, cooked bacon (reserving some for topping), and 1.5 cups cheddar cheese until well combined.
05 - While chicken finishes cooking, boil pasta in salted water for 1-2 minutes less than package directions. Drain thoroughly.
06 - Add cooked pasta and frozen peas (if using) to the slow cooker. Stir everything together until pasta is evenly coated with the creamy chicken mixture.
07 - Sprinkle remaining cheddar cheese and reserved bacon over the top. Cover and cook for an additional 10 minutes until cheese is fully melted and bubbly.
08 - Top with thinly sliced green onions just before serving.