Put the onion, carrot, garlic, thyme, bay leaves and cider (or dry white wine) in the slow cooker, then add the turkey, skin-side up. Close the lid. Cook for 6 hours on low without opening the lid.

Always leave the turkey crown to rest for 20 minutes, kept warm, before carving to ensure the meat is juicy and tender. How to cook a boneless turkey crown A boneless turkey crown, or turkey ...