Melt butter in a large skillet over medium heat and add diced pork, green onion, carrot, and broccoli.
Cook until pork is completely done and vegetables are tender, about 7-10 minutes.
Remove the pork and vegetable mixture from skillet and set aside.
Pour beaten egg into the same skillet and scramble until fully set.
Return pork mixture to the skillet with scrambled eggs.
Add cold cooked rice, frozen peas, soy sauce, garlic powder, and ground ginger.
Stir everything together and cook until heated through, 7-10 minutes.