01 - Place 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 shredded.
04 - Remove chicken and shred using two forks. Return to the slow cooker. Stir in sour cream, cooked bacon (reserving some for topping), and 1.5 cups cheddar cheese until well combined.
05 - Cook pasta in salted boiling 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 until evenly distributed.
07 - Sprinkle remaining cheddar cheese and reserved bacon over the top. Cover and heat for 10 minutes until cheese is fully melted.
08 - Top with sliced green onions just before serving.