On his first day in Huntington, W. Va., Jamie Oliver spent the afternoon at Hillbilly Hot Dogs, pitching in to cook its signature 15-pound burger. That’s 10 pounds of meat, 5 pounds of custom-made bun, American cheese, tomatoes, onions, pickles, ketchup, mustard and mayo. Then he learned how to perfect the Home Wrecker, the eatery’s famous 15-inch, one-pound hot dog (boil first, then grill in butter).