Pineapple Teriyaki Chicken Wings

Name: Pineapple-Teriyaki Chicken Wings
Ingredients: ¼ c. butter; 4 clove garlic; 1 tbsp. fresh ginger; ½ c. soy sauce; ½ c. sake; ¾ c. pineapple juice; ¼ c. rice vinegar; 2 tbsp. brown sugar; 2 tbsp. water; 1 tbsp. cornstarch; 2 lb. chicken wings; kosher or sea salt; Fresh cracked black pepper; 1 c. all-purpose flour; Vegetable oil (or other high flashpoint oil); green onions