Place the tuna, capers, vinegar, anchovy paste, and garlic cloves in the work bowl of the food processor, process on low speed until the ingredients form a rough paste.

With the machine processing on low speed, pour the olive oil into the paste in a thin stream.

When all the oil has been incorporated, add the mayonnaise, Tomato Basil Keto Chow, and lemon juice.

Process until all the Keto Chow is absorbed, and the mixture is creamy.

Transfer the tonnato sauce into a container, cover and chill in the refrigerator at least one hour to allow flavors to marry. If tonnato is too thick after chilling, thin the portion you plan to serve with more olive oil or water before serving.