In a mixing bowl, combine the yogurt, olive oil, lemon juice, minced garlic, grated ginger, ground cumin, ground coriander, turmeric powder, paprika, chili powder, garam masala, and a pinch of salt. Mix well to form a smooth marinade.

Add the lamb pieces to the marinade and ensure they are well-coated. Cover the bowl and refrigerate for at least 2 hours, or overnight for best results.

Preheat your grill or oven to a high heat (around 220°C or 430°F).

Thread the marinated lamb pieces onto skewers.

Place the skewers on the grill or in the oven and cook for about 15-20 minutes, turning occasionally until the lamb is cooked through and has a nice char.

Garnish with fresh coriander leaves and serve hot with lemon wedges.