CRYSTAL LAKE, Illinois— Mercyhealth will host a free dinner seminar on healthy holiday eating Tuesday, December 3, 6 pm, at Sage YMCA, 701 Manor Rd., Crystal Lake. The seminar is lead by Erin Swanson, registered dietician. Guests will learn how to prepare healthier holiday meals and snacks. This event is open to community members and YMCA members. Register by December 2, call (888) 39-MERCY.