Pork and beans

Pork and beans is a culinary dish that uses pork and beans as its main ingredients. Numerous variations exist, usually with more specific names, such as fabada asturiana, olla podrida, or American canned pork and beans. Although the time and place of the first appearance of American canned pork and beans is unclear, the dish was well established in the American diet by the mid-19th century. The 1832 cookbook The American Frugal Housewife lists only three ingredients for pork and beans: a quart of beans, a pound of salt pork, and pepper. Commercially canned pork and beans were introduced in the United States sometime around 1880. According to the 1975 Better Homes and Garden Heritage Cookbook, canned pork and beans was the first convenience food. Today, the dish is "an American canned classic, [and] is recognized by American consumers generally as an article of commerce that contains very little pork."

Source: Wikipedia