- STEP 1
Heat half the oil in a large, heavy-based saucepan over a high heat. Season the beef with salt and pepper, then fry, in batches, until browned on all sides. Remove with a slotted spoon and set aside.
- STEP 2
Add the rest of the oil, turn down the heat to medium, add the onion and fry for 3-4 minutes until softened and lightly golden. Add the garlic, chillies and ginger and fry for 1 minute. Add the curry paste and fry for 2-3 minutes, stirring frequently.
- STEP 3
Return the beef to the pan with the coconut milk, stock and cinnamon stick, bring to the boil, then cover with a lid and simmer gently, stirring occasionally, for 30 minutes until the beef is tender.
- STEP 4
Add the cubes of sweet potato and cook for a further 15 minutes until the sweet potato is tender. Stir in the lime juice, remove the cinnamon stick, scatter with fresh coriander leaves. Divide among bowls and serve with steamed rice.