In a 4 or 6-quart Dutch Oven, mix chicken and tomato sauce. Heat to boiling; reduce heat. Cover; simmer 5 minutes, stirring occasionally. Stir in beans, corn, and garlic. Heat to boiling; reduce heat to low.
In a medium bowl, mix Bisquick mix, cornmeal, and milk until a soft dough forms. Drop dough by 12 spoonfuls onto hot chili. (Do not drop directly into liquid!)