Pseudo-volumetric flame, procedural textures and 9 vertices to start with. Animated ignition cycle: https://www.youtube.com/watch?v=QavSm18Qp4k
PLEASE NOTE that at this point in time blender's asset browser can't handle collections properly. Instead you have to append it the old way. Sorry for the inconvenience. The developers are aware of it and do their best to find the way out of this.