Cut the pork into bite-sized pieces.
Slice onion, green onion, and bell pepper into thin strips.
Heat olive oil in a pan and stir-fry the green onion to bring out its aroma.
Add the pork and stir-fry over medium heat.
When the pork is half cooked, add onion and bell pepper, then stir-fry together.
Add low-sugar gochujang, soy sauce, minced garlic, and erythritol, and stir-fry so the seasonings soak in well.
When all ingredients are cooked through, finish with sesame oil and pepper.