Tuna Sandwiches Provencal Recipe

Ingredients

• 1/2 cup mayonnaise
• 2 tablespoons drained bottled capers, rinsed and chopped
• 2 teaspoons coarse-grain mustard
• 2 teaspoons anchovy paste
• 1 teaspoon tomato paste
• 1/2 teaspoon black pepper
• 3 tablespoons white-wine vinegar
• 2 (6-oz) cans light tuna in olive oil
• 4 ciabatta or kaiser rolls, halved horizontally
• 1 head Boston lettuce (1/2 lb), any coarse outer leaves discarded
• 2 or 3 medium tomatoes, cut into 1/3-inch-thick slices
• 3 large hard-boiled eggs, cut into 1/2-inch-thick slices