Core Ingredients:
1 lb (450g) flank steak, thinly sliced against the grain
1 green bell pepper, sliced into strips
1 red bell pepper, sliced into strips
1 medium onion, thinly sliced
3 tablespoons soy sauce
2 tablespoons oyster sauce
1 tablespoon cornstarch
1 tablespoon water (for slurry)
2 tablespoons vegetable oil
1 teaspoon sugar
1 teaspoon garlic, minced
1 teaspoon ginger, minced
Optional Additions:
1/2 teaspoon red chili flakes (for a spicy kick)
1 teaspoon sesame oil (for a nutty aroma)
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