Heat Oil in a Wok. Add Ginger,Garlic and White Part of Spring Onions. Sauté on high heat until the raw smell eliminates. Add green chillies, cabbage, carrots, green pepper and sauté for another 2 minutes.
Add roughly 3 cup of boiling water, soy Sauce, sriracha sauce, tomato ketchup, rice vinegar and allow the soup to simmer for 5 minutes.
In the meanwhile prepare a cornflour mixture by diluting Cornflour in 3 Tbsp of Water. Add this prepared mixture to the simmering soup.
Add Salt, Pepper and stir well. Taste and add more sauces if needed.
Serve the Manchow soup with a canapé of fried noodles and finely chopped spring onions.