INT. KITCHEN.
A WOMAN IS SPELLING OUT A SENTENCE ON A FRIDGE USING FRIDGE MAGNETS THAT ARE KIDS' ALPHABET TYPES.
MESSAGE: " YOUR DINNER IS IN THE FRIDGE."
THE WOMAN EXITS THE KITCHEN
FADE
A MAN WALKS INTO KITCHEN, READS THE FRIDGE MAGNET MESSAGE AND OPENS THE FRIDGE DOOR.
MAN: A bag of spuds?... What?
END
Don't like the end. Maybe a tin of Alphabetti spaghetti. (My signature dish.)
Plus he shouldn't speak.
That is a nice out... Thanks
Bill in post 
I agree with P, it should be obvious what the punch is without the dialogue.
It's also the sort of throwaway exchange you'd have in a longer piece of dialogue. "Where's my tea?" "It's in the fridge" *reveal*
The setup was intriguing though, as she could have written anything.