Description
A quick and flavorful Beef Onion Stir Fry that combines tender slices of beef sirloin with sweet onions, colorful bell peppers, and a savory garlic-soy marinade. Perfect for a speedy weeknight dinner, this stir fry is cooked in a skillet to deliver a deliciously caramelized and juicy dish served best over steamed rice or noodles.
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
- 2 medium yellow onions, thinly sliced
- 1 cup bell peppers (red, yellow, or green), sliced
- 3 cloves garlic, minced
Cooking Oils
- 2 tbsp vegetable oil
- 1 tbsp sesame oil
Instructions
- Marinate Beef: Combine sliced beef sirloin with soy sauce, the cornstarch-water mixture, and brown sugar. Mix well and let it marinate for at least 15 minutes to tenderize and infuse the beef with flavor.
- Sauté Aromatics: Heat the vegetable oil in a large skillet over medium-high heat. Add the minced garlic and sliced onions, cooking them until they become translucent and fragrant, which brings out their natural sweetness.
- Cook Vegetables: Add the sliced bell peppers to the skillet and stir-fry them for about 2 to 3 minutes until they are slightly tender but still crisp. This quick cooking retains their vibrant color and crunch.
- Cook Beef: Push the vegetables to one side of the skillet and add the marinated beef to the empty side. Cook the beef for approximately 4 to 5 minutes, stirring occasionally, until it is browned and cooked through.
- Combine and Thicken: Mix the vegetables and beef together in the center of the skillet. Add any remaining marinade to the pan and stir well, cooking for an additional 2 to 3 minutes to allow the sauce to thicken and coat all the ingredients evenly.
- Serve: Remove from heat and serve the beef onion stir fry hot, ideally over steamed rice or noodles for a complete and satisfying meal.
Notes
- To make the beef extra tender, slice it against the grain.
- Use low-sodium soy sauce to control salt content, especially if watching sodium intake.
- Feel free to substitute bell peppers with other vegetables such as snap peas or broccoli for variety.
- Serve immediately after cooking for the best texture and flavor.
- This recipe can be doubled for larger servings or meal prep.
