This sounds crazy, but it's really good, and *so* easy:

Cola Chicken
4 skinless chicken breast
1 cup ketchup
1 12oz.diet cola
Place chicken in non-stick skillet.
Pour ketchup and cola over it. Bring to a
boil-cover and reduce heat-cook 30-45 mins.
uncover turn heat up and cook until sauce
thickens and adheres to chicken.

I add some instant rice about 5 minutes before the end, and then you have a whole meal. Good stuff.