Ingredients
2 tablespoons vegetable oil, such as safflower, plus more for grates
3 medium zucchini or yellow squash, halved lengthwise and thinly sliced crosswise
1/2 medium red onion, finely chopped
3 tablespoons fresh lime juice
Coarse salt and ground pepper
1 1/2 pounds ground turkey (93 percent lean)
2 teaspoons chili powder
4 ounces pepper Jack cheese, thinly sliced
4 thick slices country bread, halved
1 avocado, halved, pitted, peeled, and thinly sliced
Store-bought salsa, for topping (optional)
Preparation
Heat grill to medium-high; lightly oil grates. In a medium bowl, combine zucchini, onion, lime juice, and oil; season with salt and pepper. Let zucchini salad marinate at room temperature, 15 minutes (or refrigerate, up to 1 day).
Form turkey into 4 patties (4 inches each). Using thumb, make an indentation in center to prevent burgers from rounding on top. Sprinkle with chili powder; season with salt and pepper. Cover and grill until an instant-read thermometer inserted in center of a burger reads 155 degrees, 4 to 5 minutes per side.
Top burgers with cheese. Cover and continue to grill until cheese has melted and internal temperature reaches 165, 2 to 4 minutes more. Meanwhile, grill bread until lightly charred. Place each burger on a piece of bread; top with avocado slices, salsa, if using, and remaining bread. Serve burgers with zucchini salad.
