Put all the ingredients into a pot and bring up to boil. Boil 7 minutes.

Cover lower the heat. After the trimmings are rendered remove the bones trimmings and rosemary stems.

Now you have some good Lamb broth. you can pour into ice trays and freeze. Remove from ice trays and put into a zip lock bag and save for when you need it.

I eat lamb from time to time, so i trim the fat off regularly and have a zip lock bag that i just add to the bag until i have enough to make broth.