Causa de atún is one of my favourite variations of causa limeña, a traditional Peruvian entrée. Causa is a cold potato-based dish, made with mashed potatoes that are flavoured with lime and chilli, then used to sandwich the filling. Traditional filling is made with shredded chicken and mayonnaise, but versions with fish and seafood are also popular and tastier, in my opinion. Legend says the name originated when Perú was under Spanish control. Street vendors would sell an early version of the dish “por la causa” (for the cause), the cause being independence from Spain. The recipe calls for ají amarillo (Peruvian yellow chilli) paste, which can be found online…