Add the thinly sliced fennel throughout a 12inch cast iron skillet. Sprinkle with 1/2 teaspoon of salt. Place chicken thighs, gold potatoes, and peeled garlic cloves on top of the fennel, then sprinkle with 1/2 teaspoon of salt.
In a bowl, melt ghee then add 1/2 teaspoon salt, turmeric, mustard powder, fennel, paprika, and cayenne powder, and whisk together to combined. Pour the spiced ghee on top of the chicken dish, using a basting brush to evenly distribute it throughout all the chicken and potatoes.
Place in the oven to bake for 25 minutes, then turn oven down to 400 degrees F to cook for another 15-20 minutes, until the internal temperatures of the chicken reads 165 degrees F.
Garnish the dish with fresh parsley and dill, the crack black pepper on top before serving!