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Beef and Onion Stir Fry

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Beef and onion stir fry is a quick and flavorful dish featuring tender beef slices and sweet caramelized onions in a savory, umami-packed sauce. Perfect for a weeknight dinner, this dish comes together in under 30 minutes and pairs wonderfully with rice or noodles.

Ingredients

  • 1 lb flank steak or sirloin, thinly sliced against the grain
  • 2 yellow or white onions, sliced
  • 3 cloves garlic, minced
  • 2 tablespoons soy sauce (for marinade)
  • 1 tablespoon cornstarch
  • 1 teaspoon sugar (for marinade)
  • 2 tablespoons oyster sauce
  • 1 tablespoon soy sauce (for sauce)
  • 1/4 cup water or beef broth
  • 1/2 teaspoon sugar (for sauce)
  • 2 tablespoons vegetable oil
  • 1/4 teaspoon ground black pepper, to taste
  • 2 green onions, chopped (optional, for garnish)

Instructions

  1. In a bowl, combine the sliced beef with 2 tablespoons soy sauce, 1 tablespoon cornstarch, and 1 teaspoon sugar. Toss to coat and let marinate for 15–20 minutes.
  2. Heat 1 tablespoon oil in a large skillet or wok over medium-high heat. Add the beef in a single layer and sear for 1–2 minutes per side until browned but not fully cooked. Remove and set aside.
  3. Add the remaining oil to the pan if needed. Sauté sliced onions for 4–5 minutes until softened and slightly caramelized.
  4. Add the minced garlic and cook for 30 seconds until fragrant.
  5. Return the beef to the pan. Add oyster sauce, 1 tablespoon soy sauce, water or broth, and 1/2 teaspoon sugar. Stir to combine.
  6. Cook for another 2–3 minutes until the sauce thickens and the beef is cooked through.
  7. Season with black pepper to taste.
  8. Garnish with chopped green onions and serve hot over rice or noodles.

Notes

  • Slice beef thinly against the grain for maximum tenderness.
  • Do not overcrowd the pan—cook beef in batches if necessary.
  • Great with added vegetables like bell peppers, broccoli, or mushrooms.
  • Can be made gluten-free by using tamari and gluten-free oyster sauce.
  • Double the sauce if serving with lots of rice or noodles.

Nutrition

Find it online: https://thefamilycooking.com/beef-and-onion-stir-fry/