Heat the olive oil in a large, pot over high heat.
Add the onion, garlic, leek, carrots, and celery. Saute the vegetables for 5 minutes until softened.
Add the chicken and cook for another 5 minutes until no longer pink.
Add the turmeric, chicken broth, bay leaf, and peppercorns. Cover with a lid and bring to a boil.
Once boiling, reduce the heat to medium-low and add in the rice. Stir the "soup" constantly for 2 minutes so the rice does not sink to the bottom.
Cover the pot halfway with the lid and simmer for another 30 minutes. The rice at this point should have burst and thickened the soup. If the soup seems too thick, add some more broth or water and season to taste.