Korean Fried Chicken

Name: Korean Fried Chicken
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: Asian, Korean
Ingredients: 4 chicken breasts ( sliced into long thick strips); 1 cup (240ml) buttermilk; 1/2 tsp salt; 1/4 tsp white pepper; 1/4 tsp garlic salt; 1 1/2 cups (180g) plain (all-purpose) flour; 1 tsp salt; 1 tsp ground black pepper; 1/2 tsp garlic salt; ½ tsp celery salt; 1 tsp dried thyme; 1 tsp paprika; 1 tsp baking powder; 1 tsp chilli flakes; vegetable oil for deep frying ((at least 1 litre/four cups)); 2 tbsp gochujang paste; 2 tbsp honey; 4 tbsp brown sugar; 4 tbsp soy sauce; 2 cloves garlic (peeled and minced); 2 tsp minced ginger; 1 tbsp vegetable oil; 1 tbsp sesame oil; 3 spring onions (sliced into thin strips); 1 tsp sesame seeds; ½ tsp chilli flakes ((red pepper flakes))