Preheat oven to 450° F.
In a large bowl, combine flour, cornmeal, baking powder, sugar and salt. Cut in butter until mixture is crumbly. Stir in cheese and milk just until moistened. Drop by 1/4 C. 2-inches apart onto an ungreased baking sheet. bake at 450° F. for 12-15 minutes or until light golden brown. Move biscuits to work area to make sandwiches.
In a medium heavy saucepan or skillet, mix barbecue sauce and ham. Bring to high simmer over medium-high heat; cover and reduce heat to medium or low; simmer 20 minutes, stirring occasionally until ham is sticky and browned. To assemble sandwiches; split open biscuits. Place approximately 1/3 C. of barbecue ham on bottom biscuit halves. Garnish with chow chow and red onions. Close with top half of biscuit.