1 can of Tuna Fish packed in water (I use Wild Planet)
1/3 cup of Mayonnaise
1 large rib of Celery finely diced
2 Tablespoons of minced Red Onion
1 teaspoon Lemon Juice
1 Tablespoon minced fresh Parsley
Salt and Freshly Ground Pepper to taste
It never hurts to let this sit covered in the fridge for 4 hours before eating, if you can wait. I like it on whole wheat bread sprinkled with a little Cayenne pepper.