Cut some lines on both sides of the chicken wings. Add salt, pepper, oyster sauce, ginger and green onion. Mix well and set aside for 15 minutes.
In a small bowl, mix all the ingredients for combined sauce together.
Add 1 tablespoon of oil in a pan and then fry the chicken wings for 2-3 minutes until the surface becomes slightly browned.
Prepare a claypot or simmering pot, add another tablespoon of cooking oil and fry garlic, ginger and green onion until aromatic. Place red onion and bell peppers in.
Then lay the chicken wings one by one and drizzle the sauce on top.
Cover the lid and simmer for 10 minutes over medium to slow fire. Serve hot.