Combine meatball ingredients in a mixing bowl. Shape into 1-inch meatballs. Add olive oil to a large skillet, turn to medium heat and cook meatballs on both sides until lightly browned and cooked through. Cover skillet and turn off the heat.
In a large pot, add chicken broth, turmeric, carrots, potatoes, and celery Bring mixture to a boil over medium-high heat. Reduce heat to a low-boil. Continue cooking until carrots, potatoes, and celery are tender, about 10 minutes. Remove pot from heat and add yogurt, stir until smooth.
Add meatballs to the soup and warm over medium-low heat for 1 minute, no more. Sprinkle soup with diced cilantro before serving.