Pesto-Dijon Egg Salad Sandwiches

Ingredients

• 1/2 cup mayonnaise
• 1/4 cup finely chopped celery
• 1/4 cup finely chopped red onion
• 2 tablespoons honey Dijon mustard
• 4 teaspoons prepared pesto
• 1 garlic clove, minced
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 8 hard-boiled large eggs, chopped
• 8 slices whole wheat bread, toasted
• 4 romaine leaves
• 4 slices tomato or 1/2 cup roasted sweet red peppers, cut into strips