Sure. Basically just this guy's work:
I eat beans, fruit, and vegetables, and that's basically it. No starchy vegetables (i.e., potatoes, squash), and occasional nuts and seeds.
No meat, grains, salt, sugar, alcohol, or pretty much anything other than fruits, vegetables, and beans.
In addition to losing weight, I lost 100 points of cholesterol and also saw improvements in my blood pressure, my teeth, my skin, and other areas.
I went off it because I got bored, and I got all the weight back. I went back on it about a month ago and I've already lost 16 pounds or so.