Crostini with Tuna Tapenade

Name: Crostini with Tuna Tapenade
Ingredients: 10 to 12 ounces canned or jarred Italian tuna packed in olive oil; 2 teaspoons anchovy paste; 1 teaspoon fresh thyme leaves; 2 tablespoons minced fresh parsley, plus extra for garnish; 1 tablespoon grated lemon zest; 2 teaspoons minced garlic (2 cloves); 3 tablespoons freshly squeezed lemon juice; 3 tablespoons good olive oil, plus extra for brushing bread; 1/3 cup Italian mascarpone cheese; 1/4 cup pitted and chopped kalamata olives; 1 tablespoon drained capers; 1 teaspoon kosher salt; 1 teaspoon freshly ground black pepper; 36 slices French bread, cut diagonally