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In a medium bowl, combine the sliced flank steak with 1 tablespoon of cornstarch, 1 tablespoon of soy sauce, and 1 teaspoon of sesame oil. Toss to coat the beef evenly. Set aside to marinate while you prepare the other ingredients.

In a separate small bowl, whisk together all the sauce ingredients: 1/2 cup soy sauce, oyster sauce, brown sugar, rice vinegar, 1 tablespoon cornstarch, and 1/4 cup water. Whisk until the cornstarch is fully dissolved and the sauce is smooth. Set aside.

Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat. Add the broccoli florets and stir-fry for 3-5 minutes, until tender-crisp and bright green. Remove the broccoli from the skillet and set aside.

Add the remaining 1 tablespoon of vegetable oil to the same skillet. Increase heat to high. Add the marinated beef in a single layer and cook for 2-3 minutes per side, until browned and cooked through. You may need to do this in batches to avoid overcrowding the pan. Remove the cooked beef from the skillet and set aside with the broccoli.

Reduce the heat to medium. Add the minced garlic and grated ginger to the skillet. Stir-fry for about 30 seconds, until fragrant. Be careful not to burn the garlic.

Give the prepared sauce a quick whisk again (as cornstarch can settle) and pour it into the skillet. Bring to a simmer, stirring constantly, until the sauce thickens, about 1-2 minutes.

Return the cooked beef and broccoli to the skillet with the thickened sauce. Toss everything together until the beef and broccoli are well coated. Cook for another 1-2 minutes to heat through.

Serve immediately over hot cooked white rice. Enjoy your quick and delicious beef and broccoli stir-fry!


In a medium bowl, combine the sliced flank steak with 1 tablespoon of cornstarch, 1 tablespoon of soy sauce, and 1 teaspoon of sesame oil. Toss to coat the beef evenly. Set aside to marinate while you prepare the other ingredients.

In a separate small bowl, whisk together all the sauce ingredients: 1/2 cup soy sauce, oyster sauce, brown sugar, rice vinegar, 1 tablespoon cornstarch, and 1/4 cup water. Whisk until the cornstarch is fully dissolved and the sauce is smooth. Set aside.

Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat. Add the broccoli florets and stir-fry for 3-5 minutes, until tender-crisp and bright green. Remove the broccoli from the skillet and set aside.

Add the remaining 1 tablespoon of vegetable oil to the same skillet. Increase heat to high. Add the marinated beef in a single layer and cook for 2-3 minutes per side, until browned and cooked through. You may need to do this in batches to avoid overcrowding the pan. Remove the cooked beef from the skillet and set aside with the broccoli.

Reduce the heat to medium. Add the minced garlic and grated ginger to the skillet. Stir-fry for about 30 seconds, until fragrant. Be careful not to burn the garlic.

Give the prepared sauce a quick whisk again (as cornstarch can settle) and pour it into the skillet. Bring to a simmer, stirring constantly, until the sauce thickens, about 1-2 minutes.

Return the cooked beef and broccoli to the skillet with the thickened sauce. Toss everything together until the beef and broccoli are well coated. Cook for another 1-2 minutes to heat through.

Serve immediately over hot cooked white rice. Enjoy your quick and delicious beef and broccoli stir-fry!
