Some examples:

2012 winner

As he told her that he loved her she gazed into his eyes, wondering, as she noted the infestation of eyelash mites, the tiny deodicids burrowing into his follicles to eat the greasy sebum therein, each female laying up to 25 eggs in a single follicle, causing inflammation, whether the eyes are truly the windows of the soul; and, if so, his soul needed regrouting.

2003 winner

They had but one last remaining night together, so they embraced each other as tightly as that two-flavor entwined string cheese that is orange and yellowish-white, the orange probably being a bland Cheddar and the white … Mozzarella, although it could possibly be Provolone or just plain American, as it really doesn’t taste distinctly dissimilar from the orange, yet they would have you believe it does by coloring it differently.

2016 Adventure Dishonorable Mention

The sea roiled like water in a pasta pot about to boil, an apt simile thought Captain Samuel Turner, because if they didn't fix their engine soon he and his crew would be floating face down like overcooked manicotti—bloated, white, limp and about to be consumed by something that wished it were eating ahi tuna instead.