Heat the olive oil in a wok or a large frying pan with high sides over medium-high heat.
Add the pork and cook for 3-4 minutes, stirring occasionally, until the pork is nicely browned on all sides.
Add the bell pepper, green onion, ginger, cashews, and garlic powder. Season with salt and black pepper, to taste. Stir fry the veggies for 2-3 minutes until they become crisp-tender.
Add the bok choy, sesame oil, and soy sauce (or alternative).
Continue to stir fry for 1-2 minutes until the bok choy wilts and the other ingredients are coated.
Remove from heat and transfer to individual serving plates. Garnish with toasted sesame seeds, if desired, and serve immediately. Enjoy!