Heat oil in an 8-quart Dutch oven or other large pot over high heat until hot but not smoking. Season meat lightly with salt and pepper and sear in oil until browned on all sides, about 5 minutes. Add onions and garlic and cook an additional 5 minutes. Add tomato paste and stir to incorporate, cooking for 2 to 3 minutes. Add celery, carrots, parsnips, chick peas, wine, chicken broth, tomato sauce, orange zest, segments and juice, and cumin. Bring to a boil, then reduce heat, cover and simmer until lamb is tender, about 90 minutes. Season with salt and pepper to taste. Remove from heat, cool slightly, and ladle into bowls. Top with fresh mint and serve.
Recipe Analysis Note: Ingredients without discrete measurements such as "Salt, to taste" or "Ice cream, optional" are omitted from analysis. This is because amounts can be highly variable and difficult to determine.