Whisk 1 tablespoon cornstarch, 3 tablespoons soy sauce, 1 teaspoon sugar and 1 tablespoon peanut oil in a large bowl. Add the steak and toss to coat; refrigerate until ready to cook.
Whisk the remaining 1 tablespoon each cornstarch and soy sauce, the oyster sauce and chicken broth in a small bowl; set aside.
Heat 1 tablespoon peanut oil in a large skillet over high heat. Add the ginger, broccoli and the remaining 1 teaspoon sugar and stir-fry 3 to 4 minutes; transfer to a plate. Heat 1 more tablespoon peanut oil in the skillet, add the onion and stir-fry 2 to 3 minutes. Add the tomatoes and cook, turning gently, 2 minutes. Transfer the onion and tomatoes to the plate with the broccoli.
Reduce the heat to medium high; add the remaining 2 tablespoons peanut oil to the skillet. Add the garlic and steak and stir-fry 1 minute. Whisk the sauce mixture, then add to the skillet and simmer 1 minute. Return the vegetables to the skillet; cook until the meat is cooked through, 3 to 4 minutes. Serve with rice, if desired.
Photograph by Antonis Achilleos
This recipe has been updated to more accurately recognize its origin or to add cultural context. It may differ from what was originally published or broadcast.