A method of preparing a han-burger includes the steps of: providing a dough of the han-burger; shaping a first portion of the dough to form a burger shell having a filling compartment and a top opening, and a second portion of the dough to form a burger cover having a size and shape geographically matching the top opening of the burger shell; applying heat to the burger shell and the burger cover to retain the shapes thereof; preparing a filling with predetermined ingredients and nutrition, wherein the filling is disposed in the filling compartment of the burger shell; and covering the burger cover at the top opening of the burger shell to enclose the filling within the filling compartment.