Preparation

Make the dipping sauce

• In a small saucepan, combine the coconut milk, peanut butter, lime juice, soy sauce, and curry paste. Cook over medium heat just until the sauce comes to a gentle simmer, whisking until smooth. Remove from the heat, cover, and set aside. Just before serving, whisk the sauce to bring it back together if it has separated.

Grill the chicken

• If using bamboo skewers, soak 12 10-inch skewers in water for at least 30 minutes before cooking time. Alternatively, use metal skewers.
• Cut the thighs evenly into 1-1/2-inch pieces. In a medium bowl, whisk the oil, lime juice, curry paste, garlic, salt, and pepper. Add the chicken to the bowl and mix well. Cover and refrigerate for 1 hour or up to 1 day.
• Heat the grill to 500°F. When hot, brush the grill grate clean. Prepare the grill for direct cooking, and reduce the temperature to medium-high heat (400°F to 450°F). Thread the chicken pieces on the skewers so that they are just touching but not tightly packed together.
• Grill the skewers over direct medium-high heat with the lid closed until the meat is firm to the touch and opaque all the way to the center, turning once or twice, 8 to 10 minutes. Arrange the skewers on a platter, and garnish with the sliced scallions. Serve immediately with the dipping sauce and lime wedges.