Nearly every vacation destination in the United States lays claim to an iconic dish. In Chicago, it’s deep-dish pizza. In Philadelphia, it’s cheesesteaks. In South Florida, it’s key lime pie. Named for the small citrus fruits said to have been introduced in the 1830s by Henry Perrine, a botanist and diplomat who discovered the plant in Mexico, this tart and creamy dessert can be found on almost every menu in the Sunshine State.