Cook rice in 400 ml boiling salted water according to package instructions.
For the curry sauce, boil half the coconut milk in a wok or large pot while stirring. Stir in curry paste and boil down for about 5 minutes. Remove the outer leaves from the lemon grass, cut the stalks in half lengthwise and cut into large pieces.
Add fish sauce and sugar and simmer over a high heat for about 5 minutes (see handle). Pour the remaining coconut milk into the curry sauce and bring to the boil.
Chop nuts. Dab meat dry and cut into thin slices. Add meat, nuts and lime leaves to the sauce. Simmer for about 5 minutes.
Wash the coriander, shake dry and pluck off the leaves. Arrange curry in bowls and sprinkle with coriander. Serve with rice.