Mouthwatering Lamb Burgers

Preheat an outdoor grill for medium-high heat, and lightly oil the grate.

Make the patties: Mix ground lamb, ground beef, mint, ginger, garlic, salt, and pepper in a large bowl until just combined. Divide evenly into four portions and shape into large patties. Set aside.

Make the sauce: Mix Greek yogurt, lemon zest, garlic, and salt in a bowl; cover and refrigerate.

Cook burger patties on the preheated grill until cooked to your desired degree of doneness, 3 to 4 minutes per side for well done. An instant-read thermometer inserted into the center should read 160 degrees F (70 degrees C).

While burgers are cooking, get ready to assemble: Place slices of onion and green tomato on the grill. Cook until lightly charred, about 1 minute on each side.

Spread yogurt sauce over sliced ciabatta rolls. Continue assembly by placing each burger patty on a roll. Divide feta cheese slices over the patties. Top each with a slice of grilled tomato, grilled onion, and 2 leaves of arugula, followed by the top half of the roll.