Beef, Bean and Cornbread Casserole

The ladies at work wanted this recipe...here it is (It's from Cooking Light)

1 lb. ground beef
1 c. chopped onion
1 garlic clove, minced
1 T. chili powder
1 1/2 t. ground cumin
1 t. sugar
1/2 t. dried oregano
2 (8oz) can no-salt tomato sauce
1 (16oz) can pinto beans, drained (or preferred bean)
1 (4.5oz) can chopped green chiles, drained
1 box Jiffy cornbread (prepare according to box)

1. Cook beef, onion, and garlic in a large saucepan over medium-high heat until browned. Drain fat in colander.
2. Preheat oven to 400.
3. Return beef mixture to pan. Add chili powder and next 6 ingredients; cover and cook over medium-low heat for 10 minutes. Pour mixture into 2-quart casserole coated with cooking spray.
4. Spread cornbread mixture over beef. Bake for 25-30 minuets (until golden brown).