Cook basmati rice, spread it out on a tray, and cool completely.
Heat vegetable oil in a wok on high flame until smoking hot.
Sauté garlic paste and chopped spring onion whites for 30 seconds.
Add finely chopped carrot, capsicum, and cabbage; stir-fry rapidly for 2 minutes to keep them crunchy.
Stir in cooled rice, soy sauce, vinegar, black pepper, and salt.
Toss continuously on high flame for 2 minutes, sprinkle with green spring onions, and serve.