How to cook lamb in slow cooker?

The ingredients are 1 tablespoon oil,4-5 lamb shanks,2 large onion which should be peeled and diced,500g of dry soup mix,3/4 cup of tomato paste or 2 can of chopped tomatoes,1/4 cup of worcestershire sauce,3-4 cups of diced vegetables carrots, potatoes (scrubbed, skin on), parsnips, turnips, corn, celery, capsicum.

Heat some oil in a very large pot or frypan. Add shanks and then cook over a medium heat until it is browned on each side. Put shanks in the slow cooker and then add remaining ingredients. Cover it and cook for 5-7 hours on a ‘high’ setting or 9-11 hours on a ‘low’ setting. Using a tongs or a fork, remove that meat from the bones and coarsely chop or shred. Remove the bones from soup. Add herbs. Taste it and season it, adding more tomato paste to it and Worcestershire, if required. If time permits, then refrigerate soup so any fat that sets on a surface can easily be removed. The flavor will just improve when soup is reheated as required.