Oil (for oiling grill grates)
For the burgers:
Heat a grill to medium-high heat. Oil the grates to prevent the burgers from sticking. To make the burgers, combine all ingredients in a large bowl and mix lightly, just until evenly combined. Form the mixture into 4-5 patties.
Cook the patties on the heated grill, about 3-4 minutes per side, flipping once. A few minutes before the burgers are finished cooking, top with sliced or shredded cheddar cheese (if desired). Cook until an instant-read thermometer inserted in the center registers 160˚ F. Remove the burgers to a plate and let rest a few minutes before serving. Assemble with burger buns, guacamole, salsa, and/or minced fresh cilantro as desired.
*If you are making fancy pants burgers (or any burger at home, really), they are deserving of a good bun. The best buns, in fact, are the ones you can bake at home. It makes such a difference, not to mention they freeze fantastically so you can make a double batch and stock up!