Prepare your ingredients before you begin cooking. Cut the chicken fillets in half lengthwise. Season with pepper, paprika, and 12 tsp salt on both sides.
Cut the sweet potato into bite-sized pieces after peeling it. Potatoes should be peeled and diced. Grate the ginger and garlic cloves together.
In a large skillet, heat the oil and butter over medium high heat. Cook the chicken fillets for 2-3 minutes per side. The cooking time will vary depending on the size of your chicken. Remove from skillet and set aside on a dish.
Cook for 2 minutes after adding the potatoes and sweet potato. Combine the garlic, ginger, turmeric, cumin, mustard seeds, and the remaining salt in a mixing bowl. Cook for 3 minutes, or until the spices are aromatic.
Bring the chicken stock to a boil. Cover and simmer for 10 minutes over medium low heat.
When finished, taste and adjust the salt. Return the chicken fillets to the pan. Simmer for 1-2 minutes, or until well heated. Finish with the cilantro. With warm naan and a creamy cucumber salad, serve. Enjoy!