Tarragon Tuna Salad

Ingredients

• 2 cans (6 ounces each) light water-packed tuna, drained and flaked
• 1 cup chopped celery
• 1/4 cup chopped sweet onion
• 1/3 cup reduced-fat mayonnaise
• 2 tablespoons minced fresh parsley
• 1 tablespoon lemon juice
• 1 teaspoon minced fresh tarragon or 1/4 teaspoon dried tarragon
• 1/2 teaspoon Dijon mustard
• 1/4 teaspoon white pepper
• Lettuce leaves, optional