Finely chop the onion and green onion.
Slice the Cheongyang chili pepper.
Heat cooking oil in a pan and stir-fry the minced beef.
When the meat is cooked, add onion, green onion, and chili pepper and stir-fry.
Add soy sauce, chili powder, minced garlic, and pepper, then stir-fry.
When all ingredients are cooked and the seasoning is evenly absorbed, it's done.