Ok, here’s the Morning Banana Diet from Japan:
A banana (or as many as you want) and room temperature water for breakfast (I LOVE room temperature water); eat anything you like for lunch and dinner (by 8 p.m.). A three o’clock snack is okay, but no desserts after meals, and you have to go to bed before midnight.
There are more rules here at bananadiet.com

Ok, well, I would probably eat 3 bananas. That’s about 300 calories. I love bananas. Ok, so let’s say I eat 3 bananas at 9am. At 11am, when I get hungry, can I eat another banana? Then I’d have lunch at 1.
I don’t really understand this diet. Why does it “work”? What’s the deal?  I guess they say you can only drink water, so I bet that’s the key.  Not to drink your calories.  Otherwise, I don’t see how it’s different. Other than the whole “no dessert” thing.

Lame.