Heat ghee in a large heavy-bottomed pan over medium-high heat.
Add cubed lamb and turmeric, browning the meat on all sides.
Pour in curry base sauce and bring to a simmer.
Reduce heat to low and simmer for 90 minutes until lamb is tender.
Stir in ground almonds, sugar, sultanas, creamed coconut, and garam masala.
Add single cream and mix well.
Simmer for final 10 minutes until sauce is rich and thick.
Serve immediately with rice or naan bread.