Sunday is National Chili Day. In celebration, these seven restaurants range from traditional offerings to nontraditional like vegetarian and verde. By Jacob Threadgill with provided and Gazette / file photos Ron’s Hamburgers and Chili 4723 N. May Ave. ronsburgersandchili.com | 405-943-7667 The chili that launched a franchise from Tulsa that has expanded to 18 locations […]