Beef and Scallion Stir-fry
- In a small bowl, whisk together 3/4 cup water, hoisin sauce, vinegar, cornstarch, 3/4 teaspoons salt, and 1/2 teaspoons pepper flakes; set aside.
- Heat 1 tablespoons oil in a 12-inch nonstick skillet over high heat. In two batches, cook steak until lightly browned, turning once, about 2 minutes per batch. Transfer to a plate.
- Add remaining teaspoon oil to pan along with garlic and whites of scallions. Cook, tossing often, until fragrant, about 1 minute. Whisk hoisin mixture to combine; add to pan along with scallion greens.
- Return meat to pan; cook, tossing to coat steak with sauce, 1 minute. Remove from heat. Serve immediately, over rice and sprinkle with pepper flakes, if desired.