Grate and Prep: Grate the zucchini and finely dice the red onion.
Combine Ingredients: In a large bowl, mix the ground turkey with the grated zucchini, 1/4 cup of red onion, and 1/2 cup of shredded cheese.
Form the Patties: Measure the mixture into four equal 1/4-pound patties.
Season the Meat: Apply a copious amount of your favorite BBQ rub to both sides of each patty.
Prepare the Avocados: Slice the avocados in half and remove the pits while the grill preheats.
Preheat the Big Green Egg: Set up your Egg for direct grilling and stabilize the temperature at 400°F.
Grill the Burgers: Place the turkey patties on the hot grates and cook for approximately 4 to 5 minutes per side.
Char the Avocados: Place the avocado halves flesh-side down on the cooking grid for the last 2 to 3 minutes of the cook to get nice grill marks.
Check Internal Temp: Remove the burgers once they reach an internal temperature of 165°F.
Rest the Meat: Let the patties rest for 5 minutes to allow the juices to redistribute.
Assemble and Serve: Place the juicy turkey patties on toasted buns and top with the smoky grilled avocado.