Popsugar Living Cooking Basics How to Slice Fennel How to Slice Fennel, No Mandoline Needed January 4, 2015 by Nicole Perry View On One Page Photo 5 of 6 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Slice the Fennel Lay the quartered fennel on one of its cut sides, and slice thinly from root to tip while using your nondominant hand to hold the quartered fennel steady. Previous Next Start Slideshow Cooking BasicsFennelVegetablesCooking How-To