The idea for these awesome burgers came from my friend Hayley. She has a fabulous shopping blog - Deals, Steals & Heels - you should check it out!
1 packet of dry taco seasoning
1.5 lbs. ground beef (~85% lean)
1 egg, lightly beaten
4 slices cheddar or cheddar jack cheese
Red onion, sliced
Guacamole (make your own! it's easy!)
In a medium bowl, combine taco seasoning, ground beef, and egg lightly until completely combined. Divide the meat into four equal patties.
Grill the patties to desired done-ness, topping with sliced cheese during the last 2 minutes of grilling. Grill the buns, too, if desired.
Place a patty on each bun, and top with sliced onion and guacamole. Enjoy!