This is the quintessential Peruvian sauce, originally the main ingredient of papa a la huancaína (Huancayo-style potato), but nowadays used as a sauce to serve alongside pretty much anything. I like to serve it with cassava chips, made by boiling frozen cassava and then frying it in butter. The original recipe has the following ingredients: ají amarillo (Peruvian yellow chilli), queso fresco (Peruvian feta cheese), evaporated milk and soda crackers. I used to sautée the chillies with onion and garlic but this is optional. I now omit the crackers to make it gluten-free and lower carb and use ají amarillo paste because I can’t find fresh ones in Sydney. Also,…