My Best Ever Tuna Fish Salad: Creamy, Crunchy & Quick!

Ingredients

• 2 (5-ounce) cans tuna, drained well
• 1/2 cup mayonnaise
• 2 tablespoons sour cream or plain Greek yogurt
• 1 tablespoon Dijon mustard
• 1 tablespoon lemon juice
• 1/4 cup finely chopped celery
• 1/4 cup finely chopped red onion
• 2 tablespoons sweet pickle relish
• 1/4 teaspoon black pepper
• Pinch of salt
• 1 hard-boiled egg, finely chopped (optional)
• 1 tablespoon chopped fresh dill or parsley (optional)