Hashbrown casserole

Funeral potatoes is a potato-based hotdish or casserole, similar to au gratin potatoes, popular in the American Intermountain West and Midwest. It is called "funeral" potatoes because it is commonly served as a side dish during traditional after-funeral dinners, but it is also served at potlucks and other social gatherings, sometimes under different names. The dish has been associated with members of the Church of Jesus Christ of Latter-day Saints because of its popularity among members of the church. According to Epicurious, the dish "emerged in Utah’s Mormon community during the late 19th century". According to NPR, the LDS Relief Society served the dish for organization functions, and it spread within the community. Recipes can be found in multiple Relief Society cookbooks dating to the early 20th century. By the mid-20th century recipes called for convenience foods.

Source: Wikipedia