Perfect Turkey Salad Sandwich

Ingredients

• 12 slices bread or sandwich rolls, toasted if desired
• lettuce leaves, Optional
• Salt
• 1/4 tsp. ground black pepper
• 1/2 cup mayonnaise, to moisten
• 1 tsp. lemon juice
• 1 tbsp. fresh parsley, chopped, Optional
• 4 cups turkey, cooked, diced
• 1/2 cup red onion, finely chopped
• 1 cup celery, diced