Just toss in assorted vegetables, stir-fry with oyster sauce and pepper.
Cut onion, carrot, broccoli, etc. into bite-sized pieces.
Heat cooking oil in a pan over medium heat.
Add onion and carrot and stir-fry for 2 minutes.
Add broccoli and stir-fry for 1 more minute.
Add oyster sauce and stir-fry for another minute, mixing everything well.
Season with salt and pepper to taste.