combine coriander , garlic, brown sugar, salt, cocoa and pepper in large bowl. stir in soy sauce, oil, lime juice and ginger.

cut chicken into 1 1/2 to 2 inch cubes. add to soy sauce mixture, stirring to coat chicken pieces. cover; marinate in refrigerate for at least 2 hours.

meanwhile, prepare peanut sauce. gradually whisk peanut oil into peanut butter in medium bowl. blend in lime juice, soy sauce, honey, garlic, cayenne pepper, and hot pepper sauce. adjust flavors to taste for a sweet/hot flavor.

thread chicken pieces into skewers. grill or broil, basting with marinade. discard leftover marinade. garnish with chopped cilantro, if desired. serve with peanut dipping sauce.