In a large wok or pan, heat the sesame oil and the cooking oil. Add the chopped onions, half of the spring onions and sauté until translucent.
Then add the ginger garlic paste and fry for a minute more.
Then add the chopped bell peppers and sauté until slightly cooked. Make sure that the peppers still have a crunch in them.
Now add the soy sauce, chili sauce, ketchup and vinegar and mix well.
Let the sauces come to a boil and then add the corn starch dissolved in water. Mix well and let the sauce thicken. This takes about a minute or two.
Now add the fried florets to the gravy and add the remaining spring onions. Mix carefully without breaking the florets and serve the Gobi Manchurian hot with fried rice!