Description
A quick and flavorful Beef Onion Stir Fry featuring tender beef sirloin, sautéed onions, and colorful bell peppers tossed in a savory garlic-soy sauce. Perfect for a weeknight dinner, this stir fry combines a balance of sweet, salty, and umami flavors with a satisfying texture.
Ingredients
Scale
Beef and Marinade
- 1 lb beef sirloin, sliced against the grain
- 3 tbsp low-sodium soy sauce
- 1 tbsp brown sugar
- 1 tsp cornstarch mixed with 2 tbsp water
Vegetables and Aromatics
- 2 medium yellow onions, thinly sliced
- 1 cup bell peppers (red, yellow, or green), sliced
- 3 cloves garlic, minced
Oils for Cooking
- 2 tbsp vegetable oil
- 1 tbsp sesame oil
Instructions
- Marinate the Beef: In a bowl, combine the sliced beef sirloin with low-sodium soy sauce, the cornstarch mixture, and brown sugar. Mix well to coat all the beef evenly. Let it marinate for at least 15 minutes to tenderize and absorb flavors.
- Sauté Aromatics and Onions: Heat 2 tablespoons of vegetable oil in a large skillet over medium-high heat. Add the minced garlic and thinly sliced yellow onions. Cook, stirring frequently, until the onions become translucent and fragrant.
- Add Bell Peppers: Toss in the sliced bell peppers and stir-fry for 2-3 minutes until they soften but still retain a slight crunch.
- Cook the Beef: Push the vegetables aside to create space in the skillet. Add the marinated beef to the empty side and cook undisturbed for about 4-5 minutes until the beef is nicely browned on all sides.
- Combine and Thicken Sauce: Return all the vegetables to the center of the skillet. Pour in any leftover marinade. Stir everything together and cook for another 2-3 minutes until the sauce thickens and coats the beef and vegetables evenly.
- Finish and Serve: Drizzle the sesame oil over the stir fry for added aroma and flavor. Mix well and serve hot over steamed rice or noodles for a complete meal.
Notes
- Slice the beef thinly against the grain to ensure tenderness.
- Marinating the beef not only flavors it but helps retain moisture during cooking.
- Use low-sodium soy sauce to control saltiness.
- Feel free to customize vegetables by adding mushrooms, snap peas, or carrots.
- Cook vegetables until crisp-tender to maintain vibrant color and texture.
- Serve immediately for the best taste and texture.
