Cut the chicken livers into two pieces (they are usually two parts joined together - break the joints and cut each part into two). Wash in a couple of changes of water and drain on a colander for a few minutes. Then marinate them with the salt and keep aside for 15-20 minutes.
To the same pan add some extra oil and fry the garlic. Add the butter and the peri peri sauce and simmer for a minute. Reduce the heat completely and add the milk slowly to the simmering paste and stir continuously till the sauce thickens. Do not cover the pan or cook the sauce on a high heat as the milk will curdle quickly. Add a few tablespoons of water to adjust the consistency of the gravy.
Depending on the livers and the type of sauce used the colour of the gravy could vary from a pale orange to almost greyish black - this however will not affect the taste of the dish.