Method:
In a small bowl, mix the sugar, cumin, pepper, rosemary, paprika, and salt together with your fingers. Spread the mixture on a large plate. Roll lamb in spice mixture, coating well on all sides.
In a large heavy pot, heat oil over medium high heat. Working in batches if needed, add lamb and brown well on all sides. Add 2 cups water and tomato sauce. Bring to a boil. Cover and simmer for 1 hour.
Add potatoes, carrots, parsnips, turnips, and onions. Cover and continue to simmer for another hour. Add green beans and peas. Simmer another 5 minutes, just until beans and peas are tender. Ladle stew into bowls and serve.