Spiced chicken: Place chicken and a large mixing bowl and top with remaining ingredients. Thoroughly toss and mix together until fully and evenly combined.
Cover, refrigerate and marinate for about 1 hour.
Parboiled rice: Bring 2 quarts water to a boil. Add rice and salt and boil for 5 minutes. Completely drain and transfer to a large mixing bowl and cool, about 15 minutes.
Saffron Rice: Preheat oven to 400˚F.
In a mixing bowl combine saffron threads and warm water. Allow mixture to steep for 5 minutes. Stir in Greek yogurt, 7 tablespoons butter, eggs and egg yolk and salt. Stir to combine.
Pour mixture over parboiled rice and stir together until completely combined.
Brush 9” pie or cake dish (glass works best) with remaining tablespoon of melted butter and add half of the rice mixture, pressing down firmly, creating an even layer.
Sprinkle soaked cranberries evenly over rice and top with remaining rice mixture, pressing down firmly once again.
Cover dish with foil and bake for about 1 hour and 10 minutes or until rice has cooked through and created a golden crust against the baking dish.
While rice is baking, cook spiced chicken. Place a large skillet over medium-high heat. Once skillet is hot, add oil and chicken and brown chicken on all sides, 3 to 6 minutes.
Reduce heat to medium and continue to cook chicken until just cooked through, 10 to 12 minutes. Remove from heat and adjust seasoning with salt and pepper as needed.
Once tachin has baked through, remove from oven and allow it to rest, about 10 minutes.
Remove foil and carefully invert tachin onto a large platter to unmold.
Top tachin with some of the chicken, serving more on the side and top with whole or chopped cilantro leaves. Serve.