Brown onion and beef and ... other ingredients except cornbread. Simmer 15 minutes. Pour into greased baking dish. Mix cornbread according to package directions ... done at 375 degrees.
Make cornbread and chop up. Combine tomatoes, ... cornbread, 1/2 tomato mixture and 1/2 mayonnaise. Repeat. Be sure mayonnaise is the top layer. Chill.