Wash the chicken gizzards thoroughly and cut them into bite-sized pieces.
Slice the onion, garlic, green onion, and hot chili pepper.
Heat cooking oil in a pan and sauté the garlic and green onion.
Add the chicken gizzards and stir-fry over high heat.
Add the onion and hot chili pepper and stir-fry together.
Season with soy sauce, salt, and pepper.
Finish with a drizzle of sesame oil.