Add oil in the same pan and heat
Add onion, spring onion and sauté well
Add green chili and stir fry
Add bell pepper, celery and stir fry
Reduce flame
Add soy sauce and stir well
Add vegetable broth, sugar, salt, black pepper powder and stir fry
Increase the flame and bring to a quick boil
Reduce flame
Add dissolved corn starch little by little and mix well until it gets thickened
Add baby corn and toss well until sauce mixes well
Add vinegar and mix well
Garnish with green spring onion
Serve hot