In a bowl, combine turkey, garlic, and use a grater to shred onion into burger. This is a key step for creating juicy burgers. I use a box grater and finely grate the onion over the meat so all the juice goes in.
Add oregano, salt, and pepper. Use your hands to mix!
Form into patties, using 1/5 of the total meat depending on size you want. They will shrink once cooked.
Heat a large cast-iron skillet with 2 tbsp avocado oil over medium heat, and once hot, add burgers.
Cook for 5 minutes, flip, then turn the heat to medium low. Cover for the next 5 minutes so the inside cooks. Repeat until all burgers are cooked.
Serve with onion, tomato, buns, or over lettuce! Enjoy!