The peanut butter and potato diet.
I like both those, and can actually see a healthy diet that has lots of both. But your post makes me think of a baked potato stuffed with PB. 
That’s one I could stick to myself. 
Yeah, I could have said Wheat Thins and hummus, but wine and peanuts was funnier.
Tacos & Ribs please. The No Forks Diet.
Hah! The “No Silverware Diet” sounds like a real thing.