When you purchase a tongue, you want to choose one that is under 3 pounds. First, scrub it well and let it soak in water for about 2 hours, being sure to change the water often to remove excess salt. Next, remove it from the rinse and put it in a pan of water that covers the tongue by 2 inches. Add other ingredients such as garlic, onion, carrots, and celery. Place the lid on the pot and bring it to a boil. Once a boil is reached, reduce the heat and let the dish simmer for an hour per pound. When the tongue is fork tender, remove it from the water and slice off the outer layer with kitchen shears. Now, you can slice it and serve it with the carrots and celery.