Combine all ingredients except the oil in a large bowl, then use your hands to form the turkey mixture into four large patties.
Meanwhile, heat the oil in a large skillet over medium-high heat for about a minute, then swirl to coat the bottom of the pan. Add the turkey burger patties.
Continue cooking over medium-high heat for about 7 minutes a side, or until burgers are nicely browned and cooked through. (I used a cast iron skillet here to get a nice char on the outside of the burgers, but you can use a regular skillet as well.)
I served my burgers on buns with sliced avocado and cheddar to continue the Southwest theme, but you can mix things up with your own favorite burger toppings of choice.
Notes
These do fall apart fairly easily, so be careful when flipping the burgers and transferring them out of the pan -- however, that doesn't affect the taste! Cooking time depends on thickness; if you decide to make, say, six smaller & thinner burgers you should flip around 5 minutes rather than at 7.