In a bowl, whisk together yogurt, cilantro, mint, ginger, garlic, and all spices.
Add the shrimp, coat well, and marinate for at least 30 minutes.
Preheat the grill or grill pan over medium-high heat.
Thread shrimp onto skewers (optional) and place on the hot grill.
Cook for 2–3 minutes per side until shrimp turn opaque and slightly charred.
Baste with melted butter or oil for extra flavor.
Remove from the grill and squeeze fresh lemon juice over the shrimp.
Serve hot with chutney or a side of cooling yogurt.