I remember a show on TV where a guy killed his wife (I think) and cut her body up into meal sized portions - roasts etc - and froze all the pieces in a large chest freezer. I seem to remember that people thought she had gone on holidays. Eventually somebody got suspicious and the police called round. The final scene showed him inviting them to stay for dinner, and serving up a roast (his wife of course) and the policeman commenting on how delicious the dinner was. I can't remember what the show was exactly, but I suspect it was either the Twilight Zone, or Tales of the Unexpected. Anyone remember it?

Then there was an episode of "The Practice" where somebody found a human head in a freezer.

Then of course, there is that verse in the Irish Ballad:

One day when she had nothing to do
Sing rickety tickety tin
One day when she had nothing to do
She cut her baby brother in two
And served him up as an Irish stew
And invited the neighbours in, -bours in
And invited the neighbours in.