- Stir-fry yellow curry paste with oil over low heat until fragrant. Add some coconut milk if too dry.
- Add chicken and stir-fry with curry paste over high heat. Slowly add the remaining coconut milk, fish sauce and sugar until boiling. If the sauce is too thick, some water can be added.
- Add potato and simmer until soft before adding tomatoes.
- Add spring onion before removing from heat. Serve with rice.