If you have leftover chicken breast from the night before, that will work wonderfully in this recipe.
If you can’t find the boquerones, or marinated anchovies, substitute for regular anchovies. You will likely want to use fewer of them, as the normal anchovies are much saltier than the boquerones. But I love both types.
You can also use some white or black truffle oil, if you are looking for more of the truffle flavor in the finished salad.