Cut broccoli florets, bell pepper, and zucchini into bite-sized pieces.
Heat vegetable oil in a wok over high flame.
Add garlic paste and stir-fry for 30 seconds until fragrant.
Add broccoli, bell pepper, and zucchini; stir-fry rapidly on high heat for 3 minutes.
Stir in soy sauce, sugar, and salt; toss continuously for 1 minute and serve hot.