Grilling: Chicken Fajitas

1/3 cup coarsely chopped fresh cilantro

1/4 cup lime juice

3 cloves minced garlic

5 tablespoons olive oil

1 teaspoon ground cumin

1 teaspoon dark brown sugar

1/2 teaspoon kosher salt

3 boneless, skinless chicken breasts, pounded to 1/2-in thick

For the vegetables:

1 large red bell pepper, cut into 1/4-inch strips

1 large green bell pepper, cut into 1/4-inch strips

1 large white onion, cut into 1/4-inch strips

Olive oil

Kosher salt

Sour cream

Flour tortillas