If you have a food processor—or even if you don’t—you’re probably aware that it comes with many parts. The bowl and the lid are the biggest ones, then there are the blades, shredders, slicers, the little arm thing that the shredders and slicers sit on (that I am always losing), and finally there’s the plunger—the tube of plastic that helps you shove carrots, cheese, zucchini, or anything else you