Season ground beef with salt and pepper to taste.
Form into patties.
Set aside
Mix mashed avocado with red onion, and season with salt and pepper
Prepare the burgers in preheated grill, over medium heat.
Flip until browned in all sides and let cook for about 5-10 minutes per side.
For well done the temperature inside should be at least 160 °F.
Assemble burgers with meat, vegetables, cheese and guacamole.
Recipe Notes
If you make extra Guacamole don’t forget to also server tortilla chips. Guacamole also makes a great dip!