Shashlik (Georgian-Style Grilled Lamb Shish Kabobs)

Ingredients

• 6 pounds boneless leg of lamb, cut into 2-3” cubes
• 2 cups medium-bodied red wine
• ½ cup red wine vinegar
• ¼ cup pomegranate molasses
• ¼ cup olive oil
• 1 tablespoon salt
• 1 tablespoon sugar
• 2 teaspoons fresh cracked black pepper
• 1 teaspoon ground coriander
• ½ teaspoon dried oregano
• 12 large or 18 small garlic cloves, peeled and smashed but intact
• 1 medium yellow onion, halved lengthwise and sliced into thick ½” rings
• Freshly ground pepper
• Kosher salt