Lamb stew is Irish penicillin: a rich stew full of potatoes, leeks and carrots that’ll cure whatever ails you. In traditional fashion, nothing here is browned first, just all stewed together. To keep it healthy make sure to trim the lamb of any visible fat before you cook it.
Combine lamb, potatoes, leeks, carrots, celery, broth, thyme, salt and pepper in a 6-quart slow cooker; stir to combine. Put the lid on and cook on low until the lamb is fork-tender, about 8 hours. Stir in parsley before serving.
Tip: To clean leeks, trim and discard green tops and white roots. Split leeks lengthwise and place in plenty of water. Swish the leeks in the water to release any sand or soil. Drain. Repeat until no grit remains.