In a food processor fitted with the slicing disk, slice two of the apples; and transfer to a small bowl. Using the same slicing disk, slice the remaining apple, the Brussels sprouts, and the shallot.
Regardless of what you’re making, use the apple slices frozen, don’t defrost them first. For desserts where the apples cook for less time, such as a crisp, crumble, or cobbler, I suggest tossing the ...