A portable, lightweight, disposable kettle-type barbecue grill, a fuel disc for use with the grill, and methods for fabricating, packaging, assembling, and using such a grill and fuel disc, are presented. The grill's components are made of lightweight materials and are configured to be nested inside one another to maximize space efficiency and durability for shipping and storage, and configured for easy unpacking and assembly by the user. Adjustable air vents control the cooking heat and speed. The fuel disc is made from charcoal and optionally includes hardwood chips and lighter fluid. Apertures in the fuel disc work together with the shape of the air vents and the grill to promote even airflow and temperature throughout the grill, resulting in consistent cooking. The grill is inexpensive and is entirely or partly made of recyclable materials, so the user may choose to dispose of the grill after a single use.