Combine 2 to 2 1/2 pounds either lamb stew meat, neck slices, ribs or shoulder and water in a large kettle. Peel and cut onion into quarters; peel carrot and cut into several pieces. Add to kettle along with salt. Simmer over very low heat for 3 to 4 hours, or until meat falls from the bones. Skim soup frequently. Let cool until fat hardens and skim off all fat. Strain the broth.