- Soak basmati rice for 30 minutes before cooking. Begin cooking rice when you start preparing the meatballs. 
- Using a mortar and pestle or small blender, grind green chilis (or cayenne), ginger, fenugreek, coriander, turmeric, cumin, mustard seeds, pepper, salt, and lime juice into a curry paste. 
- In a bowl, mix ground meat, cinnamon, cardamom, pepper, garlic, chopped onion, and beaten egg into a stiff paste. 
- With floured hands, form the meat mixture into walnut-sized round balls. 
- Heat oil in a skillet over moderate heat. Fry meatballs until light brown all over. Remove and drain on paper towels. 
- In the same skillet with remaining fat, fry the chopped onion until just soft. Add curry paste and cook for 5 minutes. 
- Transfer the fried curry paste and onion mixture to a pot. Add coconut milk and stir well over medium heat. 
- Bring curry gravy to a simmer, then add the fried meatballs. 
- Simmer koftas in the gravy for 30 minutes. 
- Serve with basmati rice, fried pappadams, and assorted accompaniments in small side dishes.