A quick and delicious stir-fry featuring tender beef and vibrant vegetables in a savory sauce.
In a small bowl, whisk together the cornstarch, beef broth, soy sauce, oyster sauce, red pepper flakes, and brown sugar until smooth.
Mix the cornstarch thoroughly to avoid lumps in the sauce.
Heat a large skillet over medium-high heat and add a drizzle of oil.
Ensure the skillet is hot before adding ingredients to achieve a good sear.
Add the minced garlic and stir-fry until fragrant, about 30 seconds.
Be careful not to burn the garlic as it can turn bitter.
Add the beef slices and stir-fry until browned but not fully cooked, about 3 minutes.
Slice the beef thinly against the grain for tenderness.
Add the broccoli, bell pepper, and carrot to the skillet and stir-fry for 4 minutes.
Cut the vegetables into uniform sizes for even cooking.
Pour the sauce into the skillet and bring to a boil. Reduce heat and simmer until the sauce thickens, about 3 minutes.
Stir the sauce continuously to prevent sticking.
Sprinkle with toasted sesame seeds before serving.
Serve immediately for the best flavor and texture.