Xinjiang Lamb Skewers

In a bowl, combine the lamb cubes, grated onion, vegetable oil, soy sauce, salt, and black pepper. Mix well and let marinate for at least 30 minutes at room temperature.

Thread the marinated lamb cubes onto the soaked wooden skewers, leaving a little space between each piece.

Preheat a grill or grill pan over medium-high heat. Lightly oil the grates.

Place the skewers on the grill and cook for 3-4 minutes on each side, or until nicely charred and cooked through.

Sprinkle the skewers with cumin powder and chili powder (if using) while grilling, turning to coat evenly.

Serve hot, with additional cumin and chili powder on the side if desired.