– 3 Tbsp extra-virgin olive oil – 2 Tbsp white-wine vinegar – 1 Tbsp Dijon mustard – Coarse salt and freshly ground pepper – 1 8- inch round loaf country-style bread – 2 cans oil-packed tuna 6 oz. each, drained – ¼ English cucumber sliced – ½ small red onion sliced – 1 cup chickpea – 2 cloves garlic – ½ avocado sliced – 3 Tbsp jarred olive tapenade – 1 cup fresh basil leave – 2 large eggs hard-boioled and sliced