Mahogany Broiled Chicken with Smoky Lime Sweet Potatoes and Cilantro Chimichurri

1 cup chopped cilantro leaves
6 tablespoons extra-virgin olive oil
3 large cloves garlic, minced
1/2 teaspoon salt, divided
1/4 teaspoon pepper, divided
5 tablespoons dark brown sugar
3 tablespoons Dijon mustard
2 tablespoons bottled hoisin sauce
2 teaspoons balsamic vinegar
1/2 cup plus 1 1/2 teaspoons lime juice, divided
1 1/2 pounds boneless skinless chicken breast halves, cut in 1-inch cubes
2 large sweet potatoes, peeled and cut in 1/2-inch pieces
2 tablespoons unsalted butter
1 teaspoon chopped canned chipotle pepper
1 teaspoon adobo sauce (from canned chipotle)
3/4 teaspoon ground cumin
1/2 teaspoon lime zest
Cilantro sprigs, for garnish

In a small bowl, mix together chopped cilantro, olive oil, minced garlic, 1/4 teaspoon of the salt and 1/8 teaspoon of the pepper; set aside.
In medium bowl, mix together brown sugar, mustard, hoisin sauce and vinegar. Reserve 2/3 of this mixture. To remainder, add 1/2 cup lime juice and stir in chicken; cover and refrigerate.
Place sweet potatoes in a heavy saucepan and cover with boiling water. Cook, covered, over medium-high heat until tender, about 15 minutes. Reserve 1/4 cup cooking liquid, then drain potatoes in colander.
Return potatoes to reserved cooking water and add butter, chipotle pepper, adobo sauce, remaining 1 1/2 teaspoons lime juice, cumin, lime zest, remaining 1/4 teaspoon salt and remaining 1/8 teaspoon pepper. Mash potatoes.
Preheat the broiler. Thread chicken on 8 bamboo skewers that have been soaked in water for 30 minutes. Broil about 6 inches from heat, basting with reserved mahogany sauce until done, about 8 minutes.
To serve, divide potatoes among 4 plates; top each with 2 skewers of chicken and drizzle with cilantro chimichurri sauce. Garnish with cilantro sprigs.

Yeah this chicken was super delicious, except it turns out that I find cilantro to be disgusting. Other than that... yum! And the potatoes- soooo good.