Embrace the Islands with These Caribbean Sandwiches

There are more than 700 islands in the Caribbean—from the Bahamas down to Bonaire—with endless palm tree-studded sandy beaches in between. On many of these Instagram-worthy shorelines, hungry tourists will find small stands selling sandwiches highlighting island culinary traditions and ingredients. The breads, proteins and condiments change with the latitude—from the Trinidadian bake and shark (shark meat topped with coleslaw, served open-faced on fried flatbread) and Jamaican jerk chicken hoagies slathered...