Prep the Chicken: Cut your boneless chicken into bite-sized pieces, roughly 1 by ½ inch slices or cubes. Place them in a mixing bowl.
Marinate the Chicken: Add the first set of ingredients listed under “To Fry the Chicken” to the bowl: soya sauce, red chilli sauce, black pepper, optional Kashmiri red chili powder/paprika, and salt.
Add Coating Ingredients: Now add the cornstarch and all-purpose flour to the same bowl.
Bind the Coating: Add the egg white. Mix everything together to coat the chicken pieces well. If the mixture feels too dry, add a splash more egg white or just sprinkle some water. Avoid making it too wet.
Let it Rest: Cover the bowl and set the chicken aside while you prepare the sauce ingredients. You can even refrigerate this overnight if you’re prepping ahead.
Prep the Sauce Ingredients: Cube or slice your onions and bell peppers. Slit the green chilies if using. Chop the garlic and spring onions.
Mix the Sauce: In a separate small bowl, combine the ingredients listed under “For the Chilli Sauce”: soya sauce, chili sauce, tomato ketchup, optional Kashmiri red chili powder, vinegar, sugar, and water. Mix it well. Taste it and adjust the sauces as needed – you’re looking for a balance of sweet, tangy, and a little heat. Keep this sauce mixture ready.
Heat the Oil: Heat about 1 inch of oil in a deep pan over medium heat. You can test if the oil is hot enough by dropping a tiny bit of the chicken coating mixture in – it should sizzle and rise steadily without browning too quickly.
Add Chicken: Carefully add the marinated chicken pieces to the hot oil, one by one. Don’t overcrowd the pan; fry in batches if necessary to keep the oil hot and the chicken crispy.
Fry Until Golden & Cooked: Fry on medium-high heat, stirring gently after the first couple of minutes, until the chicken is crisp, golden brown, and cooked through. You’ll notice the bubbles in the oil reduce when the chicken is done. Be careful not to overcook, as this can make the chicken dry.
Drain Excess Oil: Remove the fried chicken pieces and place them on kitchen paper or a wire rack to drain any excess oil.
Optional Double Fry: For even crispier chicken, you can re-fry the cooked pieces in hot oil for a minute or two.
Heat Oil & Garlic: Heat the second amount of oil (1 ½ tbsp) in a wok or a large pan over high heat. Add the chopped garlic and fry for about a minute until fragrant.
Add Veggies: Add the sliced onions, bell peppers, spring onion whites (if using), and green chilies (if using). Stir-fry them quickly until they are slightly tender but still have a good crunch, about a minute or so.
Add the Sauce: Pour the mixed sauce you prepared earlier into the pan with the vegetables. Let it bubble and cook for a minute until it thickens slightly.
Taste and Adjust: Taste the sauce at this stage. You can add a pinch more salt, sugar, vinegar, or chili sauce if needed to get the balance just right.
Add Chicken & Toss: Add the crispy fried chicken pieces to the pan with the sauce. Toss quickly on high heat for about a minute, ensuring all the chicken is well coated in the delicious sauce. Sprinkle the ¼ teaspoon of ground black pepper over the chicken.
Garnish and Serve: Garnish your beautiful Chilli Chicken with chopped spring onion greens. Serve hot immediately!