Creating Pakistani Chicken Karahi is straightforward if you follow these steps:

1. Heat Oil: In a karahi or deep pan, heat the cooking oil over medium heat.
2. Sauté Onions: Add the sliced onions and fry until they turn golden brown.
3. Add Ginger-Garlic: Stir in the ginger-garlic paste and cook for 1-2 minutes until fragrant.
4. Add Chicken: Add the chicken pieces to the pan and sauté until they are browned on all sides.
5. Add Spices: Sprinkle in the red chili powder, turmeric powder, coriander powder, and salt. Mix well to coat the chicken in the spices.
6. Add Tomatoes: Add the chopped tomatoes and green chilies. Cook until the tomatoes soften and the oil separates from the mixture.
7. Simmer: Reduce the heat to low, cover the karahi, and let it simmer for about 20-25 minutes. Stir occasionally.
8. Check for Doneness: Ensure the chicken is fully cooked and tender. If necessary, add a splash of water to prevent sticking.
9. Garnish: Once done, garnish with fresh cilantro and green chilies.
10. Serve: Remove from heat and serve hot with naan or rice.