Pakistani Chicken Karahi

Name: Pakistani Chicken Karahi
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: Indian
Ingredients: 2 tbsp ghee; 2-3 tbsp neutral oil (or sub more ghee); 1 small onion (finely chopped); 8 garlic cloves (crushed); 3/4 inch ginger (crushed); 1-2 Serrano or Thai green chili peppers (whole); 2-2.2 lbs skinless, bone-in chicken (cut up into small pieces); 8 small tomatoes (I use Roma or Vine) (diced); 2 tsp coriander powder; 1 tsp cumin powder; 1 tsp red chili powder (or to taste); 2 tsp kosher salt (divided); ¼ cup plain whole-milk yogurt (whisked); 1 tsp black peppercorns (freshly ground, or more to taste); 1/2 tsp garam masala; 2-3 green chili peppers (slit in half); 1-2 tbsp fresh ginger (julienned); 1 tbsp fresh cilantro (chopped)