01 - Place chicken breasts in the bottom of the slow cooker in a single, even layer.
02 - Combine cream cheese, shredded mozzarella, Parmesan, sour cream, half of the bacon crumbles, spring onions, garlic, onion powder, garlic powder, Italian seasoning, salt, and pepper in a medium bowl. Mix thoroughly until fully incorporated.
03 - Spread the cheese mixture evenly over each chicken breast, ensuring complete coverage.
04 - Cover and cook on LOW setting for 5 hours until chicken reaches 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 hot alongside rice, mashed potatoes, or steamed vegetables.