01 - Place chicken breasts in a single layer at the bottom of the slow cooker.
02 - In a medium bowl, combine cream cheese, shredded mozzarella, Parmesan, sour cream, half the bacon crumbles, spring onions, minced garlic, onion powder, garlic powder, Italian seasoning, salt, and black pepper. Mix until thoroughly incorporated.
03 - Spread the cheese mixture evenly over each chicken breast, ensuring complete coverage.
04 - Cover and cook on LOW setting for 5 hours, or until chicken reaches an internal temperature of 165°F and is tender throughout.
05 - Sprinkle remaining bacon crumbles and fresh herbs over the top just before serving.
06 - Serve immediately alongside rice, mashed potatoes, or steamed vegetables.