Created by KittenCal on June 11, 2012
Step 1: Heat about 2 tablespoons of oil in large heavy skillet or a wok over high heat; add in onion and stir-fry for 3 minutes or until browned. Add in garlic and chili flakes; cook 1 minute; transfer to a bowl.
Step 2: For the sauce; in a small saucepan over medium-low heat; add in ginger, soy sauce, water, 1/4 teaspoon black pepper and brown sugar; bring to boil, reduce heat and simmer 2-3 minutes, then remove from heat.
Step 3: Toss the beef strips with the cornstarch to coat; let sit for about 8-10 minutes.
Step 4: Meanwhile heat about 1/4 to 1/3 cup more oil in the wok until hot but not smoking. Add in the cornstarch-coated beef strips and saute for about 2 minutes or until the beef is just cooked through. Return the onions back to the skillet; stir-fry 1 minute. Add in the sauce and cook stirring until thickened.
Step 5: Season with salt and more black pepper if needed. Serve with hot cooked rice.