Tuna Niçoise Sandwiches With Olive Mayonnaise

• 1/2 cup mayonnaise
• 1/4 cup pitted kalamata olives, finely chopped
• 1/2 teaspoon anchovy paste
• 1 (12-ounce) can solid white tuna, drained and flaked
• 2 hard-cooked eggs, chopped
• 1/4 cup chopped red onion
• 2 tablespoons olive oil
• 2 teaspoons white wine vinegar
• 1/2 teaspoon coarsely ground pepper
• 8 slices potato bread
• 1 cup loosely packed arugula or spinach leaves
• 8 slices tomato

1. Combine first 3 ingredients in a small bowl. Combine tuna and next 5 ingredients in a medium bowl; set aside.
2. Spread mayonnaise mixture on one side of each bread slice. Divide arugula evenly among 4 bread slices; top with tomato slices.
3. Spread tuna mixture evenly over tomato slices; top with remaining 4 bread slices.

mayonnaise, olives, anchovy paste, solid white tuna, eggs, red onion, olive oil, white wine vinegar, ground pepper, bread, arugula, tomato

Taken from www.myrecipes.com/recipe/tuna-nioise-sandwiches-with-olive-mayonnaise (may not work)