Sauté the onion with ghee for 3 mins, then add the mince and cook for 20 mins, constantly stirring to prevent the meat from clumping. When the meat is browned, add salt, sweet pepper, black pepper and cardamom. Then, add chicken stock and cook on high heat for 10 mins. Add rice, stir for 5 mins and cover. Cook, covered, on low heat for 12 mins. When the rice is cooked, mix in the green peas and some of the fried nuts.