
Creado con IA
Slice the beef sirloin into thin strips.
Cut the red and green bell peppers into thin strips and slice the onion.
In a small bowl, mix the soy sauce, rice vinegar, brown sugar, and cornstarch until smooth.
Heat the vegetable oil in a large pan or wok over medium-high heat.
Add the ginger and garlic to the pan and stir-fry for about 30 seconds until fragrant.
Add the beef strips to the pan and stir-fry for 3-4 minutes until browned.
Add the sliced bell peppers and onion to the pan and stir-fry for another 3-4 minutes until the vegetables are tender-crisp.
Pour the sauce mixture over the beef and vegetables, stirring constantly until the sauce thickens and coats the ingredients evenly.
Serve the sweet and sour beef stir-fry hot over steamed rice or noodles.