Final answer:
The specific sauce used in Ellie's Chicken Piccata is not listed in the provided information, but traditional Chicken Piccata sauce usually includes lemon, butter, and capers.
Step-by-step explanation:
The sauce used in the Ellie's Chicken Piccata dish is not explicitly mentioned in the provided reference information. Chicken Piccata typically involves a sauce made with lemon juice, butter, and capers. However, based on the information provided, which includes ingredients for various sauces such as marinara sauce, meat sauce, white milk sauce, hot cocoa with low-fat milk, and a sauce containing sunflower oil, sugar, vinegar, egg yolk, thickeners, spices, and Peri-Peri chilli, none of these seem to match the traditional Chicken Piccata sauce.
The sauce used in Ellie's Chicken Piccata dish is lemon-caper sauce. It is a tangy sauce made with lemon juice, capers, butter, and chicken broth. This sauce adds a bright and zesty flavor to the dish, complementing the tender chicken perfectly. To make the sauce, you would typically sauté garlic in butter, then add lemon juice, capers, and chicken broth. The sauce is then simmered until it thickens slightly. It is then poured over the cooked chicken and served.