1 cup plain yogurt
½ cup fresh lime juice
2 tbsp. olive oil
2 tbsp. orange zest
1 tbsp. ground cumin
1 tbsp. kosher salt
1 tbsp. ground black pepper
2 tsp. crushed saffron
1 tsp. ground coriander
6 cloves garlic, minced
1 large yellow onion, sliced
2 lb. boneless, skinless chicken thighs
4 plum tomatoes, cored
Ground sumac, to garnish
2 limes, halved
Lavash or pita, for serving