* Clean and wash the beans the night before. Place them in a container, and cover with fresh water. Let the beans soak in the water overnight. 
        * The next day, when ready to cook, drain the beans. In a stockpot, pour 1 quart (1 liter) water and add the beans. Boil for about 20 minutes or until the beans are tender. Let the beans cool to room temperature.
        
        *** If using canned beans, drain the beans and rinse them with fresh water before  preparing the salad.
        
        * Transfer the beans to a bowl.
        * Add celery and drained tuna fish.
        * Add vinegar. Season with salt and pepper.
        * Mix thoroughly.
        * Add extra-virgin olive oil. Mix to combine the ingredients and serve.
        
 
    
        * 3/4 lb (300 gr) dry cannellini beans, or 2 cans white beans
        * 4 - 5 tender celery sticks, diced
        * 1 can tuna fish in oil (approximately 1/2 lb, 200 gr), drained
        * 1 - 2 tablespoons white wine vinegar (optional)
        * salt and pepper
        * 4 tablespoons extra-virgin olive oil