Whisk 1 tbsp wine, 1 tbsp soy sauce, 1 tbsp sesame oil and cornstarch in a bowl. Add chicken and coat. Refrigerate 30 minutes.
In another bowl combine remaining wine, soy sauce, and sesame oil. Mix in chili paste, brown sugar and vinegar.
Add water chestnuts, peanuts, green onions and garlic to the sauce mixture.
Heat sauce mixture in a skillet over medium heat until aromatic.
Cook marinated chicken in a separate pan over medium-high heat until fully cooked.
Add chicken to sauce skillet and simmer 1–2 minutes until sauce thickens and coats chicken.