Korean Beef Bok Choy - cooking recipe

Ingredients

12 ounces beef flank steak
1/3 cup korean stir-fry teriyaki sauce
1 1/4 lbs baby bok choy, larger leaves removed and quartered, centers quartered lengthwise
4 teaspoons vegetable oil
3 tablespoons water
crushed red pepper flakes

Preparation

Cut steak diagonally across the grain in 1/4 inch thick slices.
Heat 1 tsp oil in a large nonstick skillet over medium-high heat until rippling. Add half the meat; stir-fry 30 seconds until no longer pink.
Remove to a bowl.
Repeat with another tsp oil and rest of meat.
Add to bowl; stir in 2 Tbsp stir-fry sauce.
Add 2 more tsp oil to skillet, then bok choy. Stir-fry 30 seconds.
Add 3Tbsp water; cover and steam 1 minute. Uncover, add remaining sauce and stir-fry 1 minute until bok choy is crisp-tender.
Add meat and juices; stir-fry 20 seconds to heat through.
Sprinkle with crushed red pepper, if desired.