It's no secret I grew up in north Georgia. And in Georgia and other parts of the South, there are certain restaurants everyone will visit at least once in their lives, if not regularly. One of those is called Krystal (some people will say "Krystals" or "Krystal's", but the official name is "Krystal"). Krystal is known for their hamburgers, which use small thin patties of ground beef, come on a square bun that is steamed with the meat patty while it cooks, and served in a square open-ended box. Their appeal is almost legendary - a deliciously simple burger that is inexpensive and quite satisfying for almost anyone. Long a favorite of poor college students or anyone else on a limited budget, Krystal burgers have been popular since their first restaurant opened in the 1930s.
For those of you who live in northern climates, you might be familiar with White Castle, which produces a very similar product. There are some differences in how these two restaurants cook and serve their respective burgers, but I'm not going to weigh the merits of either here; I'll leave that to you.
The modern interpretation of these burgers is called a slider, but as you've seen from other recipes on this site a slider can contain all sorts of other things, and even use round buns made especially for that purpose. This recipe uses plain square dinner rolls, keeping the heritage of a simple, easy, but satisfying little burger intact.
Adapted from CopyKat Recipes