Begin by washing and chopping your mixed vegetables, onion, and mincing garlic, and grating fresh ginger. Arrange them neatly for efficiency.

In a large pan or wok, heat 2–3 tablespoons of vegetable oil over medium-high heat until it shimmers, about 2–3 minutes.

Add minced garlic and grated ginger to the pan. Sauté for about 30 seconds until fragrant.

Add sliced onion and cook for 2-3 minutes until translucent.

Stir in mixed vegetables and cook for 5-7 minutes until bright and tender-crisp.

Pour in soy sauce and optional oyster sauce, tossing to coat vegetables. Cook for 1-2 additional minutes.

Season with salt and pepper to taste.

Remove from heat, sprinkle sesame seeds, and serve immediately over cooked rice or noodles.