On a pan sear the chicken with 1 tbsp cooking oil on high heat 3 minutes each side. Do it in batches so we don’t crowd the pan. Set aside.
In the same pan heat 1 tbsp cooking oil with garlic & shallot for 1 minutes. Then add water, 2 tbsp sweet soy sauce, ketchup, chili sauce, chicken stock powder, worcestershire sauce, salt, and pepper. Stir until combined. You can add extra 1 tbsp sweet soy sauce if you like it sweeter.
Add seared chicken to the pan & cooked on medium heat for 15 minutes. Then add red bell pepper & 2 tbsp green onion and cook for 10 minutes.
After the sauce has thickened, turned off the heat. Chicken bell pepper stir fry is ready to serve.