In a Large Bowl, add the turkey, onion, cumin, coriander, cinnamon, olive oil, 2 Tsp salt and 1 Tsp Pepper. Toss well, cover, and refrigerate for at least 30 minutes or up to 1 Day.

Preheat grill to high. Thread the turkey and onion pieces equally onto 6 skewers.

Grill over high heat until nicely charred and cooked through, about 12 minutes, turning every 3 minutes to grill evenly on all sides.

Transfer to a serving platter. Garnish with mint leaves, sliced peppers, and lemon wedges.