Soy sauce - 3 tbsp
Tomato purée - 3 tbsp
Vinegar - 3 tbsp
Brown sugar - 3 tbsp
Salt - 1 tsp
Black pepper powder - 1 tsp
Chilli powder - 1 tsp
Cumin powder - 1 tsp
Method
Mix all the ingredients and bring to boil.
Cook for 5 mins.
Allow it to cool and transfer to a clean container.