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 shreds easily.
04 - Remove chicken and shred with two forks. Return to slow cooker and stir in sour cream, cooked bacon reserving some for topping, and 1.5 cups cheddar cheese.
05 - Meanwhile, boil pasta in salted water for 1-2 minutes less than package directions. Drain well.
06 - Add cooked pasta and peas if using to the slow cooker. Stir thoroughly to combine all ingredients.
07 - Sprinkle remaining cheddar cheese and reserved bacon on top. Cover and heat for 10 minutes until cheese is fully melted.
08 - Top with sliced green onions just before serving.