1 (7 ounce) jar olive oil-packed tuna, oil reserved
⅔ cup mayonnaise
6 oil-packed anchovy fillets
¼ cup extra-virgin olive oil, or more to taste
3 tablespoons lemon juice, or more to taste
2 tablespoons drained capers
1 clove garlic, minced, or more to taste
1 pinch cayenne pepper
salt and freshly ground black pepper to taste
Blend tuna with reserved oil, mayonnaise, anchovies, olive oil, lemon juice, capers, and garlic together in a blender until completely smooth. Season with cayenne pepper, salt, and black pepper.