Marinate the chicken with all the marination ingredients and leave for at least 30 minutes.
Heat oil for deep frying and drop in the chicken pieces with a spoon. Fry on medium heat till thoroughly cooked. Remove on a paper towel.
Make the sauce in a bowl and put aside.Heat oil in a pan and saute garlic for 1 minute. Add the capsicum and fry on high heat for 2 minutes only.
Then pour in the sauce and wait for it to bubble.
Prepare a cornflour slurry and gradually add it to the sauce on medium heat. Stop when you reach your desired consistency. Remember the sauce will continue to thicken while cooking.
Add the spring onions and fried chicken. Give a good toss and let simmer for 2 minutes.
Turn off heat and put the gravy in your serving dish. Garnish with spring onion and sesame sides.