Ingredients:

  • 1 pound beef sirloin, thinly sliced against the grain
  • 2 medium sweet onions, thinly sliced
  • 2 cups bell peppers, assorted colors, sliced
  • 3 cloves garlic, minced
  • 2 tablespoons vegetable oil
  • 1/4 cup soy sauce (low-sodium preferred)
  • 1 tablespoon oyster sauce (optional)
  • 1 tablespoon brown sugar
  • 1 teaspoon cornstarch
  • 1/4 cup water
  • 2 green onions (scallions), chopped
  • Sesame seeds (optional)

Instructions:

  1. Thinly slice the beef against the grain. Slice sweet onions and bell peppers. Mince garlic.
  2. In a mixing bowl, combine soy sauce, oyster sauce (if using), brown sugar, cornstarch, and water. Whisk until smooth and set aside.
  3. Heat vegetable oil in a large skillet or wok over medium-high heat.
  4. Add sliced beef to the pan in a single layer; sear for about 2-3 minutes until browned, stirring occasionally. Remove and set aside.
  5. In the same pan, add onions and stir-fry for about 2 minutes until soft. Add garlic and bell peppers; stir-fry an additional 2-3 minutes.
  6. Return beef to the pan and pour the sauce over the mixture. Stir well; cook for another 2-3 minutes, allowing the sauce to thicken slightly.
  7. Garnish with chopped green onions and sesame seeds, if desired. Serve immediately.