We start with the sauce by adding in a bowl all the ingredients and keeping aside.
We place a large frying pan on high heat, and we pour half the oil. We wait for a minute to heat up and we add the peppers and leeks frying for 2-3’ just to soften a bit. Remove from the pan and keep aside.
In the same pan we add the rest of the oil and a minute later we add the chicken pieces. We fry for about 5-6’ while tossing frequently and until they are no more pinkish on the outside.
We add the sauce to the pan, with a splash of water, along with the chicken and we continue cooking for another 5-6’ for the sauce to reduce and thicken. A minute before the end we bring back to the pan the peppers and leeks and we mix well.
Serve and garnish with scallions.