Italian Tuna Melts

Name: Italian Tuna Melts
Ingredients: 3 tablespoons extra-virgin olive oil, plus more for brushing; 1 tablespoon red wine vinegar; 1 teaspoon Dijon mustard; Two 6-ounce cans Italian tuna in olive oil, drained and flaked; 9 ounces marinated artichokes, coarsely chopped (1 1/2 cups); 1/2 cup pitted green olives, coarsely chopped (3 1/2 ounces); 1/2 cup thinly sliced red onion; 1 1/2 tablespoons shredded basil; Salt and freshly ground pepper; 4 long ciabatta rolls or 1 long ciabatta loaf, split lengthwise; 1 garlic clove; 1/2 pound Robiola cheese or Brie, rind removed and cheese sliced