In a small bowl, soak the saffron threads in 1 tablespoon of warm water and set aside to infuse.
In a medium bowl, combine the cubed chicken breast with Greek yogurt, turmeric, half of the garam masala, sea salt, and black pepper; marinate for at least 15 minutes.
Rinse the basmati rice under cold water until the water runs clear, then boil in a pot of salted water for 6 minutes until parboiled, then drain.
Heat the ghee in a heavy-bottomed pot over medium heat and sauté the sliced onions until they are golden brown and caramelized.
Add the minced garlic and grated ginger to the onions, cooking for 1 minute until the mixture is highly fragrant.
Add the marinated chicken to the pot and cook for 5 minutes, stirring occasionally until the exterior is no longer pink.
Layer the parboiled rice evenly over the chicken, then sprinkle with the remaining garam masala, fresh cilantro, fresh mint, and the saffron-infused water.
Cover the pot with a tight-fitting lid and reduce heat to low, allowing it to steam for 12 minutes until the rice is fluffy and chicken is cooked through.