Chemo treatments leave him sick, his energy zapped. For 18 years, Mitchell, a former chef for Eli Lilly and Co. and Purdue University, has been the man behind the meal served Thanksgiving Day to parishioners, struggling neighbors, senior citizens and the homeless. The single father of three adult children opened his kids' eyes to the needs of the homeless when they were in elementary school. A diagnosis on Father's Day seemed a cruel joke. Mitchell is undergoing treatment, hopeful he can beat it again, but he knows the fight he's up against. "Chef Dave," as he's also known around church, spent the weekend working in St.