1. Combine all ingredients (except cheese) in a large mixing bowl.
2. Heat your grill or pan to medium-high. Form burger patties and add to a plate.
3. Add burgers to hot grill or pan. They did fine on the grill, but would probably be even juicier (and prettier) if made in a grill pan. Grill for about 5-6 minutes per side.
4. While the burgers are grilling, prepare the toppings. I went with lettuce "buns", tomatoes, onion, avocado, and ended up adding mustard. I also roasted sweet potato fries and zucchini and mushrooms tossed in avocado oil, salt, and pepper. If using, add slices of cheese just before the burger is ready to come off the grill.
5. Once everything is prepared, assemble your juicy burgers and preferred toppings and enjoy!
