Pan Bagnat: Le French Tuna Salad Sandwich

INGREDIENTS

• sea salt and freshly ground black pepper, to taste
• 4-6 basil leaves
• 1/4 cup Italian flat leaf parsley, finely chopped
• 1/2 small red onion, finely chopped
• 1 clove garlic, cut in half
• 1 (6oz) can tuna
• 1/4 cup blanched French green beans, sliced into thirds (optional)
• 6 tablespoons extra virgin olive oil, plus more for drizzling
• 1 jar or can artichoke hearts, drained and chopped (optional)
• 1/2 loaf crusty French baguette
• 3 tablespoons fresh lemon juice
• 1/2 cup red bell pepper, seeded and sliced thin
• 3/4 cups Nicoise or Kalamata olives, sliced