Stir-Fried Beef with Green Beans and Water Chestnuts | America's Test Kitchen

Ingredients

• 1/3 cup oyster sauce
• 1/3 cup low-sodium beef broth
• 2 teaspoons unseasoned rice vinegar
• 1/2 teaspoon red pepper flakes
• 2 tablespoons vegetable oil
• 1 flank steak (about 1 1/2 pounds), cut into thin slices (see note)
• 1 pound green beans , trimmed and cut into 2-inch pieces
• 2 (8-ounce) cans sliced water chestnuts , drained
• 8 garlic cloves , minced
• 2 tablespoons grated fresh ginger