Firstly, prepare all your vegetables. ( You can use a store-bought mix of chopped veggies.)
Chop onion, garlic, and ginger finely.
In a skillet, heat oil. Add ginger and garlic, followed by onions and some of the scallions. Sauté until onions become tender and translucent.
Add all the vegetables. Cook for 3-4 minutes depending on the type of vegetables you are using.
Cook until vegetables are partially cooked.
Then, add salt, black pepper, chili powder, soy sauce, tomato ketchup, chili sauce, and vinegar. Cook for 1 minute. Now add ¼ cup of water and let all the sauces cook and come together. It shuould take about 3-4 minutes at low medium flame.
Add boiled rice and mix well. Take care not to mix vigorously because this will break rice grains.
Remove from heat, add scallions, and serve hot with Manchurian or Chop Suey or on their own.