Cut pork into bite-sized pieces.
Slice onion, bell pepper, and zucchini into thin strips.
Make the sauce by mixing gochujang (Korean chili paste), soy sauce, minced garlic, chili powder, oligosaccharide syrup, and black pepper.
Add the sauce to the pork and mix well.
Heat oil in a pan and stir-fry the onions.
Add the pork and the rest of the vegetables, then stir-fry over high heat.
Once all the ingredients are cooked, serve them on a plate.