Remove the stems from the tomatoes, make cross-shaped cuts, and blanch them in boiling water for 1 minute. Cool in cold water and peel the skins.

Peel and core the apples, then cut them into pieces. Chop the onions. Blend the apples, onions, ginger, garlic, and tomatoes in a blender.

Pour the blended mixture into a wok or pot. Add all the seasonings and cook over high heat, stirring occasionally.

Once it starts boiling, continue cooking for 7–8 minutes.

Let the sauce cool completely.