Cut the pork into bite-sized pieces.
Slice the onion and green onion thinly.
Heat olive oil in a pan and stir-fry the pork over high heat.
Add the sliced onion, green onion, and minced garlic, and stir-fry together.
Season with chili powder, soy sauce, and erythritol instead of gochujang.
Stir-fry until all ingredients are cooked through, then serve on a plate.