Dry roast the following spices on a low flame until aromatic: 2 tbsp coriander seeds, 1 tsp cumin, 2 tsp shahi jeera, 2 tbsp green cardamom, 5–6 black cardamom, a 3-inch piece of cinnamon, 1 tbsp black pepper, 7–8 dry red chillies, 7–8 bay leaves, 2 tsp cloves, and 3 mace blades. Finish by adding 1 tbsp kasuri methi and let the mixture cool completely. Once cooled, grind the roasted spices coarsely along with ½ grated nutmeg, ½ tsp turmeric, and a pinch of salt. This fragrant homemade biryani masala can be stored in an airtight container for up to 3 months.