Method
In a large Dutch oven or pot, add 1 tablespoon oil and place over medium-high heat.
Add lamb in batches to sear and remove with slotted spoon, set aside.
Add leek and onion to pot and stir. Cook for 4 minutes.
Meanwhile, add turmeric, salt, black pepper and red pepper flakes to lamb and toss with spoon.
Add tomato paste to onion mixture and stir. Cook for 1 minute and add lamb back into pot.
Add beef broth over top of lamb and stir. Cover with lid and simmer for 2 hours.
Remove lid and add potatoes. Cover and continue to cook for 30 minutes.
Ladle into bowls and sprinkle with fresh basil or parsley. Enjoy