Spicy Pan Bagnat

Ingredients

• 4 large, round chewy rolls
• 1/3 cup extra-virgin olive oil
• 2 tablespoons red wine vinegar
• 2 teaspoons chile powder such as New Mexican, preferably freshly ground
• 4 ounces tuna packed in olive oil
• 2 tomatoes, thinly sliced
• 2 hard-boiled eggs, peeled and thinly sliced
• 12 anchovy fillets
• 2 tablespoons capers, rinsed and drained
• 1/4 cup pitted salt-cured black olives
• 4 to 8 lettuces leaves such as red leaf, green leaf, or butterhead