"I like to marinate the vegetables and chicken separately because I grill them on separate skewers (the vegetables/fruit grill for less time). If you are skewering the chicken and vegetables together on the same skewer, you could marinate them together knowing they'll be cooked for the same amount of time. It just kind of gives me the eebie-jeebies to marinate the veggies in with the chicken. Issues. Because of the honey in the marinade, the chicken and vegetables can burn a bit easier (and get blacker grill marks) so make sure to use moderate heat not high heat...."