Directions
1. Make an olive tapenade by placing olives, 3 tablespoons olive oil, lemon juice, thyme, garlic, capers and anchovies (optional) in a blender; purée until smooth.
2. Cut the top off the bread. Scoop out the inside of the bread, leaving 1/2-inch of crust.
3. Spread the tapenade on the bottom of the cut out loaf.
4. Top with sliced red onion, basil leaves, tomato slices, arugula and mozzarella. Drizzle with remaining olive oil.
5. Top the loaf with the previously sliced off piece of bread.
6. Slice into sandwiches.
Leftover tapenade can be served with toast points as part of a charcuterie board.