01 - Place chicken breasts in a single layer at the bottom of the slow cooker.
02 - Combine cream cheese, mozzarella, Parmesan, sour cream, half the bacon, spring onions, garlic, onion powder, garlic powder, Italian seasoning, salt, and pepper in a medium bowl. Mix until thoroughly incorporated.
03 - Spread the cheese mixture evenly over each chicken breast.
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 and fresh herbs over the top just before serving. Serve hot alongside rice, mashed potatoes, or steamed vegetables.