Heat closed contact grill for 5 minutes.
Meanwhile, in small saucepan, combine maple syrup, chives and mustard; mix well. Cook over low heat until thoroughly heated, stirring occasionally.
When grill is heated, place bratwurst patties on bottom grill surface. Close grill; cook 5 to 7 minutes or until browned and no longer pink in center.
Brush tops of patties with syrup mixture. Close grill; cook an additional 1 to 2 minutes or until glazed. Serve remaining warm syrup mixture with patties.