Chicken Skewers with Meyer Lemon Salsa

INGREDIENTS

• 1/2 cup finely chopped English hothouse cucumber
• Freshly ground black pepper
• 1 serrano chile (with seeds), finely chopped
• 3 tablespoons thinly sliced scallions, divided
• 1/4 cup plain whole-milk yogurt
• 1/4 cup plus 2 tablespoons chopped fresh cilantro
• Pinch of sugar
• 8 Meyer lemons
• 1 teaspoon cracked coriander seeds
• 1 teaspoon turmeric (optional)
• 2 garlic cloves, coarsely chopped
• 1 tablespoon vegetable oil
• Kosher salt
• 1 1/2 pounds skinless, boneless chicken thighs, cut into 1 1/2" pieces