Boil water in a pot, add oil and salt, and then add the noodles. Cover and cook for 7-8 mins or till al dante.
Drain the water, and rinse the noodles with cold water to prevent over-cooking, and set them aside.
Heat oil in a wok, add scallions, and red onion, and saute on high flame for 30 secs. Then add ginger-garlic paste and mix well.
Add chopped capsicum, cabbage, carrots, and salt, and saute them for a minute on high flame.
In a bowl, add vegetable broth, soy sauce, vinegar, red chili sauce, chopped garlic and ginger, and curry powder. Mix well
Add the prepared sauce to the wok, and mix properly. Then make a corn slurry, and pour it over the sauce slowly while simultaneously stirring, to thicken the sauce.
Now, combine the noodles with the sauce, and sprinkle kadai masala powder, onion greens, and red onions on top.
Your Singapore street noodles are ready to be served.