Take the chicken breast off about 500 grams and cut them into small cubes using a cutter board and a knife.
Take a glass bowl, and add chicken pieces to it.
Now marinate the chicken by adding black pepper, salt, corn starch, soya sauce, and minced ginger garlic paste in a glass bowl.
After marination, let them aside for about 15 minutes so that the spices get penetrated well into the chicken.
Now take another bowl to make a sauce.
Take water in a bowl and add dark soya sauce, vinegar, tomato ketchup, and corn starch and stir them to mix well.
Take a non-stick pan and put it on a stove on a medium flame.
Add a minimal amount of oil to a pan.
In a pan, place the marinated chicken and cook it for about 4 to 5 minutes.
After that, transfer, the cooked chicken to a bowl and set it aside for later use
Now again, put the pan on a stove.
Pour a minimal amount of oil into a pan. Add grated ginger and garlic paste and red chilli flakes.
Cook them for a few seconds.
Add onion cubes and green and red bell pepper to a pan and cook it for about 3 to 4 minutes.
Sprinkle salt and black pepper as a taste enhancer.
Now pour the prepared sauce into the pan containing the onion and pepper mixture and cook it for 2 minutes.
Lastly, add cooked chicken to the pan and cook it for a minute.
A very juicy and saucy chicken is ready to serve. You can serve it with fried rice and nan roti as per your choice.