Tamale Beef Squares

From the One-Dish Bible (some changes)

1 (6.5 oz) package corn muffin and cornbread mix
1/3 cup milk
1 egg
1 tablespoon oil
1 pound of really lean ground beef
3/4 cup chopped onion
1 cup corn
1 can Mex-style stewed tomatoes
2 teaspoons cornstarch
3/4 cup shredded cheddar

1. Preheat oven to 400F. Grease 12x8 inch baking dish.

2. Prepare cornbread mix as directed using milk, egg and oil. Spread in bottom of dish.

3. Cook ground beef and onion in large skillet until beef is slightly browned. Break up the meat. Drain fat, add corn.

4. Mix together undrained tomatoes and cornstarch. Stir into beef mixture, cook until meat is done

5. Spoon beef mix over cornbread mix. Cover with foil. Bake 15 min. Uncover, bake 10 minutes more. Sprinkle with cheese. Return to oven; bake 2-3 minutes to melt the cheese.
Let stand 5 minutes. Cut into squares and serve.

Things I did differently with this recipe:
I didn't have the mex stewed tomatoes. So I just chopped up fresh tomatoes and mixed with cornstarch.
I seasoned the beef with chile and cumin to give it a mex flavor.

Don't use Trader Joe's brand cornbread mix for this one. Their's is as sweet as cake, and it does not go well with this savory recipe.