Lol, sounds like Flora. She dances and growls at me (playfully) for her food, and by the time I've released her to eat she's already done!
Some things you can try:
A kong wobbler. AWESOME awesome, can't say it enough. It keeps Flora busy for at least 10 minutes.
Some people put dog food in muffin pans or in some other kind of pan with obstructions in it, so that the dog has to work around those things in order to eat.
Uh... that's all I can think of, lol. Good luck!