Heat the olive in a large saucepan with a tight-fitting lid over medium heat until hot. Add thyme, leeks, and garlic; cook and stir for 5 minutes.
Add ground beef; cook, crumbling with a spoon, for 10 minutes. Stir in remaining ingredients (carrots through cumin).
Reduce heat, cover and simmer for 20 minutes or until beef is cooked through and vegetables are tender.