Place pork slices in a medium bowl; sprinkle with cornstarch and toss until coated.
Heat half of the oil in a large skillet over medium-high heat; add pork and stir-fry for 3 to 4 minutes or until cooked through; remove from skillet and keep warm.
Heat remaining oil in the skillet; add bok choy, bell pepper and carrot; stir-fry for 4 minutes or until tender-crisp.
Return pork to skillet; add remaining ingredients; toss until heated through.