Begin by creating a creamy mayonnaise base. In a blender, combine the large egg, red wine vinegar, and Dijon mustard. Blend until the mixture is smooth.
Next, add the olive oil-packed tuna along with its packing oil, the chopped anchovy fillets, rinsed capers, red pepper flakes, and black pepper to the blender.
Blend all the ingredients together until you achieve a smooth consistency.
