Ingredients..
Red and green Bell pepper
1Onion
300g chicken boneless
1/2 teaspoon salt
1/2 teaspoon ground pepper
batter
4tbsp all purpose flour
1tbsp cornstarch
1tsp salt 
1/2 teaspoon baking powder
Sauce
4tbsp tomato ketchup
3tbsp sugar
1tbsp white vinegar
3/4 tsp soy sauce
1tbsp water

Procedure
Chicken cut into bite size,add salt and pepper to taste,and then mix.set aside for 15 mins

>Batter<
Combine flour ,cornstarch,salt ,baking powder and add 5tbsp water,mix to make a smooth batter ,dip chicken in batter and deep fry.

>Sauce<
Combine tomatoketchup ,sugar,water,vinegar ,soy sauce mix to make sweet and sour sauce and set aside.

In pan heat oil put the bell pepper and onion stir 1min on high heat,pour the sweet and sour sauce.cook 1min on high heat,put the fried chicken stir fry 2mins on high heat,fry till sauce coats the chicken,