- In a large kadai heat 2 tbsp oil and stir fry 2 clove garlic, 1 inch ginger and 1 chilli. add 2 tbsp spring onion and stir fry until it softens. further, add 1 carrot, 3 tbsp cabbage, ½ capsicum and 5 beans. stir fry for 2 minutes or until the veggies are half cooked. add 4 cup water, 2 tbsp soy sauce, 2 tbsp vinegar and 1 tsp chilli sauce. also, add ½ tsp pepper powder, ½ tsp sugar and ½ tsp salt. boil for 3 minutes or until flavours is absorbed well. now prepare cornflour slurry by mixing 2 tbsp cornflour in ¼ cup water. pour the slurry into the soup and mix well. continue to boil for 2 more minutes. finally, add 2 tbsp spring onion and enjoy hot and sour soup.