Prepare marinade: combine all ingredients except ham & rosemary in bowl, mix well. Pour marinade over ham steaks in dish, turning to coat evenly. Cover and refrigerate 1 hour.
Prepare charcoal or gas grill. Place ham steaks on grill over medium heat.
Grill ham steaks 3 to 5 minutes per side, turning once and brushing with extra marinade.
To Freeze: Freeze in freezer safe container.
To Reheat: Reheat in microwave or on grill until hot.