Beef and Green Pepper Stir-Fry with Oyster Sauce is a quick and easy recipe that is full of flavor. Thinly sliced beef is stir-fried with green peppers and onions, and then tossed in a savory oyster sauce. The oyster sauce adds a rich and umami flavor to the dish, while the green peppers provide a fresh and slightly crunchy texture. Serve this stir-fry over steamed rice or noodles for a delicious and satisfying meal.