Grilled Sweet Potato Fries

Bahan-bahan (6 porsi)

• 4 large sweet potatoes (scrubbed with skin on)
• 2 tablespoons kosher salt (plus 1 teaspoon, divided)
• 2 tablespoons extra-virgin olive oil
• 1 tablespoon brown sugar (light or dark)
• 1 teaspoon ground chipotle chile pepper
• Chopped fresh cilantro (optional for serving)