Beef Nihari

Name: Beef Nihari
Cuisine: Indian
Ingredients: 2 lb beef shank ((cut into 2 to 3-inch chunks)); 1 lb marrow bones ((optional; for better flavor)); 4 tbsps ghee ((or cooking oil)); 1 onion (thinly sliced); 1 tbsp ginger-garlic paste; 1 tbsp black peppercorns; 1 tbsp coriander seeds; 1 tsp cumin seeds; 3 bay leaves; 1 star anise; 4 cardamom pods; 2 black cardamoms; 1 cinnamon stick; ½ piece nutmeg; 1 mace; 1½ tbsps ground spices ((see ingredients above)); 1½ tbsp red chili powder ((use 1 tbsp if you want your beef nihari to be less spicy)); 2 tsp turmeric powder; 1 tsp salt ((Add 1 to 2 tsps of salt to your taste)); hot water; sugar ((Add towards the end of cooking and adjust to your taste.)); 2 tbsps flour; ½ cup cold water; 2 tbsps Fresh ginger ((julienned)); ¼ cup Fresh cilantro ((chopped)); 1 lime ((wedged))