There are tuna hoagies, and then there's the incomparable smoked tuna hoagie at Duck Deli, a charming barbecue joint near Doylestown with knotty-pine booths and freshly squeezed lemonade served in mason jars. With the same care that he applies to his pulled pork and ribs, owner Chris Forlano smokes three-pound tuna loins rubbed with cracked black pepper and brown sugar over hickory wood, then combines the flavorful fish with homemade mayonnaise. Best. Tuna. Ever.