1.

Place tongue, onion, bay leaves, carrot, and garlic in a saucepan just big enough to hold them. Add chicken broth until mostly covered (you may not need all of it, depending on how big your pot is). Bring to a boil over high heat, reduce to a simmer, cover with a tight-fitting lid, and cook until completely tender, four to six hours depending on the size of the tongue, adding extra water as necessary to keep the tongue mostly submerged.