Combine the tuna, lemon zest, two tablespoons of lemon juice, garlic, capers, olive oil, salt and pepper in a food processor and blitz until smooth.
10 ounces tuna packed in oil, 1 lemon, 2 cloves garlic, 2 tablespoons capers, 1 tablespoon extra virgin olive oil, ½ teaspoon salt, ½ teaspoon black pepper